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   After treating individually of all the virtues and vices that pertain to 
men of all conditions and estates, we must now consider those things 
which pertain especially to certain men. Now there is a triple difference 
between men as regards things connected with the soul's habits and acts. 
First, in reference to the various gratuitous graces, according to 1 Cor. 
12:4,7: "There are diversities of graces . . . and to one . . . by the 
Spirit is given the word of wisdom, to another the word of knowledge," 
etc. Another difference arises from the diversities of life, namely the 
active and the contemplative life, which correspond to diverse purposes 
of operation, wherefore it is stated (@1 Cor. 12:4,7) that "there are 
diversities of operations." For the purpose of operation in Martha, who 
"was busy about much serving," which pertains to the active life, 
differed from the purpose of operation in Mary, "who sitting . . . at the 
Lord's feet, heard His word" (@Lk. 10:39,40), which pertains to the 
contemplative life. A third difference corresponds to the various duties 
and states of life, as expressed in Eph. 4:11, "And He gave some 
apostles; and some prophets; and other some evangelists; and other some 
pastors and doctors": and this pertains to diversity of ministries, of 
which it is written (@1 Cor. 12:5): "There are diversities of ministries."
   With regard to gratuitous graces, which are the first object to be 
considered, it must be observed that some of them pertain to knowledge, 
some to speech, and some to operation. Now all things pertaining to 
knowledge may be comprised under "prophecy," since prophetic revelation 
extends not only to future events relating to man, but also to things 
relating to God, both as to those which are to be believed by all and are 
matters of "faith," and as to yet higher mysteries, which concern the 
perfect and belong to "wisdom." Again, prophetic revelation is about 
things pertaining to spiritual substances, by whom we are urged to good 
or evil; this pertains to the "discernment of spirits." Moreover it 
extends to the direction of human acts, and this pertains to "knowledge," 
as we shall explain further on (Question [177]). Accordingly we must first of all 
consider prophecy, and rapture which is a degree of prophecy.
   Prophecy admits of four heads of consideration: (1) its essence; (2) its 
cause; (3) the mode of prophetic knowledge; (4) the division of prophecy.
Under the first head there are six points of inquiry:
(1) Whether prophecy pertains to knowledge?
(2) Whether it is a habit?
(3) Whether it is only about future contingencies?
(4) Whether a prophet knows all possible matters of prophecy?
    (5) Whether a prophet distinguishes that which he perceives by the gift 
of God, from that which he perceives by his own spirit?
(6) Whether anything false can be the matter of prophecy?
	
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  Objection 1: It would seem that prophecy does not pertain to knowledge. For it 
is written (Ecclus. 48:14) that after death the body of Eliseus 
prophesied, and further on (Ecclus. 49:18) it is said of Joseph that "his 
bones were visited, and after death they prophesied." Now no knowledge 
remains in the body or in the bones after death. Therefore prophecy does 
not pertain to knowledge.
  Objection 2: Further, it is written (@1 Cor. 14:3): "He that prophesieth, 
speaketh to men unto edification." Now speech is not knowledge itself, 
but its effect. Therefore it would seem that prophecy does not pertain to 
knowledge.
  Objection 3: Further, every cognitive perfection excludes folly and madness. 
Yet both of these are consistent with prophecy; for it is written (Osee 
9:7): "Know ye, O Israel, that the prophet was foolish and mad [*Vulg.: 
'the spiritual man was mad']." Therefore prophecy is not a cognitive 
perfection.
  Objection 4: Further, just as revelation regards the intellect, so inspiration 
regards, apparently, the affections, since it denotes a kind of motion. 
Now prophecy is described as "inspiration" or "revelation," according to 
Cassiodorus [*Prolog. super Psalt. i]. Therefore it would seem that 
prophecy does not pertain to the intellect more than to the affections.
  On the contrary, It is written (@1 Kgs. 9:9): "For he that is now called 
a prophet, in time past was called a seer." Now sight pertains to 
knowledge. Therefore prophecy pertains to knowledge.
  I answer that, Prophecy first and chiefly consists in knowledge, 
because, to wit, prophets know things that are far [procul] removed from 
man's knowledge. Wherefore they may be said to take their name from 
{phanos}, "apparition," because things appear to them from afar. 
Wherefore, as Isidore states (Etym. vii, 8), "in the Old Testament, they 
were called Seers, because they saw what others saw not, and surveyed 
things hidden in mystery." Hence among heathen nations they were known as 
"vates, on account of their power of mind [vi mentis]," [*The Latin 
'vates' is from the Greek {phates}, and may be rendered 'soothsayer'] 
(Etym. viii, 7).
   Since, however, it is written (@1 Cor. 12:7): "The manifestation of the 
Spirit is given to every man unto profit," and further on (@1 Cor. 14:12): 
"Seek to abound unto the edification of the Church," it follows that 
prophecy consists secondarily in speech, in so far as the prophets 
declare for the instruction of  others, the things they know through 
being taught of God, according to the saying of Is. 21:10, "That which I 
have heard of the Lord of hosts, the God of Israel, I have declared unto 
you." Accordingly, as Isidore says (Etym. viii, 7), "prophets" may be 
described as "proefatores [foretellers], because they tell from afar 
[porro fantur]," that is, speak from a distance, "and foretell the truth 
about things to come."
   Now those things above human ken which are revealed by God cannot be 
confirmed by human reason, which they surpass as regards the operation of 
the Divine power, according to Mk. 16:20, "They . . . preached 
everywhere, the Lord working withal and confirming the word with signs 
that followed." Hence, thirdly, prophecy is concerned with the working of 
miracles, as a kind of confirmation of the prophetic utterances. 
Wherefore it is written (@Dt. 34:10,11): "There arose no more a prophet in 
Israel like unto Moses, whom the Lord knew face to face, in all the signs 
and wonders."
  Reply to Objection 1: These passages speak of prophecy in reference to the third 
point just mentioned, which regards the proof of prophecy.
Reply to Objection 2: The Apostle is speaking there of the prophetic utterances.
  Reply to Objection 3: Those prophets who are described as foolish and mad are not 
true but false prophets, of whom it is said (@Jer. 3:16): "Hearken not to 
the words of the prophets that prophesy to you, and deceive you; they 
speak a vision of their own heart, and not out of the mouth of the Lord," 
and (Ezech. 13:3): "Woe to the foolish prophets, that follow their own 
spirit, and see nothing."
  Reply to Objection 4: It is requisite to prophecy that the intention of the mind 
be raised to the perception of Divine things: wherefore it is written 
(Ezech. 2:1): "Son of man, stand upon thy feet, and I will speak to 
thee." This raising of the intention is brought about by the motion of 
the Holy Ghost, wherefore the text goes on to say: "And the Spirit 
entered into me . . . and He set me upon my feet." After the mind's 
intention has been raised to heavenly things, it perceives the things of 
God; hence the text continues: "And I heard Him speaking to me." 
Accordingly inspiration is requisite for prophecy, as regards the raising 
of the mind, according to Job 32:8, "The inspiration of the Almighty 
giveth understanding": while revelation is necessary, as regards the very 
perception of Divine things, whereby prophecy is completed; by its means 
the veil of darkness and ignorance is removed, according to Job 12:22, 
"He discovereth great things out of darkness."
	
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  Objection 1: It would seem that prophecy is a habit. For according to Ethic. 
ii, 5, "there are three things in the soul, power,  passion, and habit." 
Now prophecy is not a power, for then it would be in all men, since the 
powers of the soul are common to them. Again it is not a passion, since 
the passions belong to the appetitive faculty, as stated above (FS, Question [22], Article [2]); whereas prophecy pertains principally to knowledge, as stated in 
the foregoing Article. Therefore prophecy is a habit.
  Objection 2: Further, every perfection of the soul, which is not always in 
act, is a habit. Now prophecy is a perfection of the soul; and it is not 
always in act, else a prophet could not be described as asleep. Therefore 
seemingly prophecy is a habit.
  Objection 3: Further, prophecy is reckoned among the gratuitous graces. Now 
grace is something in the soul, after the manner of a habit, as stated 
above (FS, Question [110], Article [2]). Therefore prophecy is a habit.
  On the contrary, A habit is something "whereby we act when we will," as 
the Commentator [*Averroes or Ibn Roshd, 1120-1198] says (De Anima iii). 
But a man cannot make use of prophecy when he will, as appears in the 
case of Eliseus (@4 Kgs. 3:15), "who on Josaphat inquiring of him 
concerning the future, and the spirit of prophecy failing him, caused a 
minstrel to be brought to him, that the spirit of prophecy might come 
down upon him through the praise of psalmody, and fill his mind with 
things to come," as Gregory observes (Hom. i super Ezech.). Therefore 
prophecy is not a habit.
  I answer that, As the Apostle says (@Eph. 5:13), "all that is made 
manifest is light," because, to wit, just as the manifestation of the 
material sight takes place through material light, so too the 
manifestation of intellectual sight takes place through intellectual 
light. Accordingly manifestation must be proportionate to the light by 
means of which it takes place, even as an effect is proportionate to its 
cause. Since then prophecy pertains to a knowledge that surpasses natural 
reason, as stated above (Article [1]), it follows that prophecy requires an 
intellectual light surpassing the light of natural reason. Hence the 
saying of Micah 7:8: "When I sit in darkness, the Lord is my light." Now 
light may be in a subject in two ways: first, by way of an abiding form, 
as material light is in the sun, and in fire; secondly, by way of a 
passion, or passing impression, as light is in the air. Now the prophetic 
light is not in the prophet's intellect by way of an abiding form, else a 
prophet would always be able to prophesy, which is clearly false. For 
Gregory says (Hom. i super Ezech.): "Sometimes the spirit of prophecy is 
lacking to the prophet, nor is it always within the call of his mind, yet 
so that in its absence he knows that its presence is due to a gift." 
Hence Eliseus said of the Sunamite woman (@4 Kgs. 4:27): "Her soul is in 
anguish, and the Lord hath hid it from me, and hath not told me." The 
reason for this is that the intellectual light that is in a subject by 
way of an abiding and complete form, perfects the intellect chiefly to 
the effect of knowing the principle of the things manifested by that 
light; thus by the light of the active intellect the intellect knows 
chiefly the first principles of all things known naturally. Now the  
principle of things pertaining to supernatural knowledge, which are 
manifested by prophecy, is God Himself, Whom the prophets do not see in 
His essence, although He is seen by the blessed in heaven, in whom this 
light is by way of an abiding and complete form, according to Ps. 35:10, 
"In Thy light we shall see light."
   It follows therefore that the prophetic light is in the prophet's soul 
by way of a passion or transitory impression. This is indicated Ex. 
33:22: "When my glory shall pass, I will set thee in a hole of the rock," 
etc., and 3 Kgs. 19:11: "Go forth and stand upon the mount before the 
Lord; and behold the Lord passeth," etc. Hence it is that even as the air 
is ever in need of a fresh enlightening, so too the prophet's mind is 
always in need of a fresh revelation; thus a disciple who has not yet 
acquired the principles of an art needs to have every detail explained to 
him. Wherefore it is written (@Is. 1:4): "In the morning He wakeneth my 
ear, so that I may hear Him as a master." This is also indicated by the 
very manner in which prophecies are uttered: thus it is stated that "the 
Lord spake to such and such a prophet," or that "the word of the Lord," 
or "the hand of the Lord was made upon him."
   But a habit is an abiding form. Wherefore it is evident that, properly 
speaking, prophecy is not a habit.
  Reply to Objection 1: This division of the Philosopher's does not comprise 
absolutely all that is in the soul, but only such as can be principles of 
moral actions, which are done sometimes from passion, sometimes from 
habit, sometimes from mere power, as in the case of those who perform an 
action from the judgment of their reason before having the habit of that 
action.
   However, prophecy may be reduced to a passion, provided we understand 
passion to denote any kind of receiving, in which sense the Philosopher 
says (De Anima iii, 4) that "to understand is, in a way, to be passive." 
For just as, in natural knowledge, the possible intellect is passive to 
the light of the active intellect, so too in prophetic knowledge the 
human intellect is passive to the enlightening of the Divine light.
  Reply to Objection 2: Just as in corporeal things, when a passion ceases, there 
remains a certain aptitude to a repetition of the passion---thus wood 
once ignited is more easily ignited again, so too in the prophet's 
intellect, after the actual enlightenment has ceased, there remains an 
aptitude to be enlightened anew---thus when the mind has once been 
aroused to devotion, it is more easily recalled to its former devotion. 
Hence Augustine says (De orando Deum. Ep. cxxx, 9) that our prayers need 
to be frequent, "lest devotion be extinguished as soon as it is kindled."
   We might, however, reply that a person is called a prophet, even while 
his prophetic enlightenment ceases to be actual, on account of his being 
deputed by God, according to Jer. 1:5, "And I made thee a prophet unto 
the nations."
  Reply to Objection 3: Every gift of grace raises man to something above human 
nature, and this may happen in two ways. First, as to the substance of 
the act---for instance, the working of miracles, and the knowledge of the 
uncertain and hidden things of Divine wisdom---and for such acts man is 
not granted a habitual gift of grace. Secondly, a thing is above human 
nature as to the mode but not the substance of the act---for instance to 
love God and to know Him in the mirror of His creatures---and for this a 
habitual gift of grace is bestowed.
	
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  Objection 1: It would seem that prophecy is only about future contingencies. 
For Cassiodorus says [*Prol. super Psalt. i] that "prophecy is a Divine 
inspiration or revelation, announcing the issue of things with 
unchangeable truth." Now issues pertain to future contingencies. 
Therefore the prophetic revelation is about future contingencies alone.
  Objection 2: Further, according to 1 Cor. 12, the grace of prophecy is 
differentiated from wisdom and faith, which are about Divine things; and 
from the discernment of spirits, which is about created spirits; and from 
knowledge, which is about human things. Now habits and acts are 
differentiated by their objects, as stated above (FS, Question [54], Article [2]). 
Therefore it seems that the object of prophecy is not connected with any 
of the above. Therefore it follows that it is about future contingencies 
alone.
  Objection 3: Further, difference of object causes difference of species, as 
stated above (FS, Question [54], Article [2]). Therefore, if one prophecy is about 
future contingencies, and another about other things, it would seem to 
follow that these are different species of prophecy.
  On the contrary, Gregory says (Hom. i super Ezech.) that some prophecies 
are "about the future, for instance (@Is. 7:14), 'Behold a virgin shall 
conceive, and bear a son'"; some are "about the past, as (@Gn. 1:1), 'In 
the beginning God created heaven and earth'"; some are "about the 
present," as (@1 Cor. 14:24,25), "If all prophesy, and there come in one 
that believeth not . . . the secrets of his heart are made manifest." 
Therefore prophecy is not about future contingencies alone.
  I answer that, A manifestation made by means of a certain light can 
extend to all those things that are subject to that light: thus the 
body's sight extends to all colors, and the soul's natural knowledge 
extends to whatever is subject to the light of the active intellect. Now 
prophetic knowledge comes through a Divine light, whereby it is possible 
to know all things both Divine and human, both spiritual and corporeal; 
and consequently the prophetic revelation extends to them all. Thus by 
the ministry of spirits a prophetic revelation concerning the perfections 
of God and the angels was made to Is. 6:1, where it is written, "I saw 
the Lord sitting upon a throne high and elevated." Moreover his  prophecy 
contains matters referring to natural bodies, according to the words of 
Is. 40:12, "Who hath measured the waters in the hollow of His hand," etc. 
It also contains matters relating to human conduct, according to Is. 
58:1, "Deal thy bread to the hungry," etc.; and besides this it contains 
things pertaining to future events, according to Is. 47:9, "Two things 
shall come upon thee suddenly in one day, barrenness and widowhood."
   Since, however, prophecy is about things remote from our knowledge, it 
must be observed that the more remote things are from our knowledge the 
more pertinent they are to prophecy. Of such things there are three 
degrees. One degree comprises things remote from the knowledge, either 
sensitive or intellective, of some particular man, but not from the 
knowledge of all men; thus a particular man knows by sense things present 
to him locally, which another man does not know by human sense, since 
they are removed from him. Thus Eliseus knew prophetically what his 
disciple Giezi had done in his absence (@4 Kgs. 5:26), and in like manner 
the secret thoughts of one man are manifested prophetically to another, 
according to 1 Cor. 14:25; and again in this way what one man knows by 
demonstration may be revealed to another prophetically.
   The second degree comprises those things which surpass the knowledge of 
all men without exception, not that they are in themselves unknowable, 
but on account of a defect in human knowledge; such as the mystery of the 
Trinity, which was revealed by the Seraphim saying: "Holy, Holy, Holy," 
etc. (@Is. 6:3).
   The last degree comprises things remote from the knowledge of all men, 
through being in themselves unknowable; such are future contingencies, 
the truth of which is indeterminate. And since that which is predicated 
universally and by its very nature, takes precedence of that which is 
predicated in a limited and relative sense, it follows that revelation of 
future events belongs most properly to prophecy, and from this prophecy 
apparently takes its name. Hence Gregory says (Hom. i super Ezech.): "And 
since a prophet is so called because he foretells the future, his name 
loses its significance when he speaks of the past or present."
  Reply to Objection 1: Prophecy is there defined according to its proper 
signification; and it is in this sense that it is differentiated from the 
other gratuitous graces.
  Reply to Objection 2: This is evident from what has just been said. We might also 
reply that all those things that are the matter of prophecy have the 
common aspect of being unknowable to man except by Divine revelation; 
whereas those that are the matter of "wisdom," "knowledge," and the 
"interpretation of speeches," can be known by man through natural reason, 
but are manifested in a higher way through the enlightening of the Divine 
light. As to "faith," although it is about things invisible to man, it is 
not concerned with the knowledge of the things believed, but with a man's 
certitude of assent to things known by others.
  Reply to Objection 3: The formal element in prophetic knowledge is the Divine 
light, which being one, gives unity of species to prophecy, although the 
things prophetically manifested by the Divine light are diverse.
	
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  Objection 1: It would seem that by the Divine revelation a prophet knows all 
that can be known prophetically. For it is written (Amos 3:7): "The Lord 
God doth nothing without revealing His secret to His servants the 
prophets." Now whatever is revealed prophetically is something done by 
God. Therefore there is not one of them but what is revealed to the 
prophet.
  Objection 2: Further, "God's works are perfect" (@Dt. 32:4). Now prophecy is a 
"Divine revelation," as stated above (Article [3]). Therefore it is perfect; and 
this would not be so unless all possible matters of prophecy were 
revealed prophetically, since "the perfect is that which lacks nothing" 
(Phys. iii, 6). Therefore all possible matters of prophecy are revealed 
to the prophet.
  Objection 3: Further, the Divine light which causes prophecy is more powerful 
than the right of natural reason which is the cause of human science. Now 
a man who has acquired a science knows whatever pertains to that science; 
thus a grammarian knows all matters of grammar. Therefore it would seem 
that a prophet knows all matters of prophecy.
  On the contrary, Gregory says (Hom. i super Ezech.) that "sometimes the 
spirit of prophecy indicates the present to the prophet's mind and nowise 
the future; and sometimes it points not to the present but to the 
future." Therefore the prophet does not know all matters of prophecy.
  I answer that, Things which differ from one another need not exist 
simultaneously, save by reason of some one thing in which they are 
connected and on which they depend: thus it has been stated above (FS, 
Question [65], Articles [1],2) that all the virtues must needs exist simultaneously on 
account of prudence and charity. Now all the things that are known 
through some principle are connected in that principle and depend 
thereon. Hence he who knows a principle perfectly, as regards all to 
which its virtue extends, knows at the same time all that can be known 
through that principle; whereas if the common principle is unknown, or 
known only in a general way, it does not follow that one knows all those 
things at the same time, but each of them has to be manifested by itself, 
so that consequently some of them may be known, and some not.
   Now the principle of those things that are prophetically manifested by 
the Divine light is the first truth, which the prophets do not see in 
itself. Wherefore there is no need for their knowing all possible matters 
of prophecy; but each one knows some  of them according to the special 
revelation of this or that matter.
  Reply to Objection 1: The Lord reveals to the prophets all things that are 
necessary for the instruction of the faithful; yet not all to every one, 
but some to one, and some to another.
  Reply to Objection 2: Prophecy is by way of being something imperfect in the 
genus of Divine revelation: hence it is written (@1 Cor. 13:8) that 
"prophecies shall be made void," and that "we prophesy in part," i.e. 
imperfectly. The Divine revelation will be brought to its perfection in 
heaven; wherefore the same text continues (@1 Cor. 113:10): "When that 
which is perfect is come, that which is in part shall be done away." 
Consequently it does not follow that nothing is lacking to prophetic 
revelation, but that it lacks none of those things to which prophecy is 
directed.
  Reply to Objection 3: He who has a science knows the principles of that science, 
whence whatever is pertinent to that science depends; wherefore to have 
the habit of a science perfectly, is to know whatever is pertinent to 
that science. But God Who is the principle of prophetic knowledge is not 
known in Himself through prophecy; wherefore the comparison fails.
	
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Article: 5  [<< | >>]
	
  Objection 1: It would seem that the prophet always distinguishes what he says 
by his own spirit from what he says by the prophetic spirit. For 
Augustine states (Confess. vi, 13) that his mother said "she could, 
through a certain feeling, which in words she could not express, discern 
betwixt Divine revelations, and the dreams of her own soul." Now prophecy 
is a Divine revelation, as stated above (Article [3]). Therefore the prophet 
always distinguishes what he says by the spirit of prophecy, from what he 
says by his own spirit.
  Objection 2: Further, God commands nothing impossible, as Jerome [*Pelagius. 
Ep. xvi, among the supposititious works of St. Jerome] says. Now the 
prophets were commanded (@Jer. 23:28): "The prophet that hath a dream, let 
him tell a dream; and he that hath My word, let him speak My word with 
truth." Therefore the prophet can distinguish what he has through the 
spirit of prophecy from what he sees otherwise.
  Objection 3: Further, the certitude resulting from a Divine light is greater 
than that which results from the light of natural reason. Now he that has 
science, by the light of natural reason knows for certain that he has it. 
Therefore he that has prophecy by a Divine light is much more certain 
that he has it.
  On the contrary, Gregory says (Hom. i super Ezech.): "It must be 
observed that sometimes the holy prophets, when consulted, utter certain 
things by their own spirit, through being much accustomed to prophesying, 
and think they are speaking by the prophetic  spirit."
  I answer that, The prophet's mind is instructed by God in two ways: in 
one way by an express revelation, in another way by a most mysterious 
instinct to "which the human mind is subjected without knowing it," as 
Augustine says (Gen. ad lit. ii, 17). Accordingly the prophet has the 
greatest certitude about those things which he knows by an express 
revelation, and he has it for certain that they are revealed to him by 
God; wherefore it is written (@Jer. 26:15): "In truth the Lord sent me to 
you, to speak all these words in your hearing." Else, were he not certain 
about this, the faith which relies on the utterances of the prophet would 
not be certain. A sign of the prophet's certitude may be gathered from 
the fact that Abraham being admonished in a prophetic vision, prepared to 
sacrifice his only-begotten son, which he nowise would have done had he 
not been most certain of the Divine revelation.
   On the other hand, his position with regard to the things he knows by 
instinct is sometimes such that he is unable to distinguish fully whether 
his thoughts are conceived of Divine instinct or of his own spirit. And 
those things which we know by Divine instinct are not all manifested with 
prophetic certitude, for this instinct is something imperfect in the 
genus of prophecy. It is thus that we are to understand the saying of 
Gregory. Lest, however, this should lead to error, "they are very soon 
set aright by the Holy Ghost [*For instance, cf. 2 Kgs. 7:3 seqq.], and 
from Him they hear the truth, so that they reproach themselves for having 
said what was untrue," as Gregory adds (Hom. i super Ezech.).
   The arguments set down in the first place consider the revelation that 
is made by the prophetic spirit; wherefore the answer to all the 
objections is clear.
	
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  Objection 1: It would seem that things known or declared prophetically can be 
false. For prophecy is about future contingencies, as stated above (Article [3]). Now future contingencies may possibly not happen; else they would 
happen of necessity. Therefore the matter of prophecy can be false.
  Objection 2: Further, Isaias prophesied to Ezechias saying (@Is. 38:1): "Take 
order with thy house, for thou shalt surely die, and shalt not live," and 
yet fifteen years were added to his life (@4 Kgs. 20:6). Again the Lord 
said (@Jer. 18:7,8): "I will suddenly speak against a nation and against a 
kingdom, to root out and to pull down and to destroy it. If that nation 
against which I have spoken shall repent of their evil, I also will 
repent of the evil that I have thought to do them." This is instanced in 
the example of the Ninevites, according to Jn. 3:10: "The Lord [Vulg.: 
'God'] had mercy with regard to the evil which He had said that He would 
do to them, and He did it not." Therefore the matter of prophecy  can be 
false.
  Objection 3: Further, in a conditional proposition, whenever the antecedent is 
absolutely necessary, the consequent is absolutely necessary, because the 
consequent of a conditional proposition stands in the same relation to 
the antecedent, as the conclusion to the premises in a syllogism, and a 
syllogism whose premises are necessary always leads to a necessary 
conclusion, as we find proved in I Poster. 6. But if the matter of a 
prophecy cannot be false, the following conditional proposition must 
needs be true: "If a thing has been prophesied, it will be." Now the 
antecedent of this conditional proposition is absolutely necessary, since 
it is about the past. Therefore the consequent is also necessary 
absolutely; yet this is unfitting, for then prophecy would not be about 
contingencies. Therefore it is untrue that the matter of prophecy cannot 
be false.
  On the contrary, Cassiodorus says [*Prol. in Psalt. i] that "prophecy is 
a Divine inspiration or revelation, announcing the issue of things with 
invariable truth." Now the truth of prophecy would not be invariable, if 
its matter could be false. Therefore nothing false can come under 
prophecy.
  I answer that, As may be gathered from what has been said (Articles [1],3,5), 
prophecy is a kind of knowledge impressed under the form of teaching on 
the prophet's intellect, by Divine revelation. Now the truth of knowledge 
is the same in disciple and teacher since the knowledge of the disciple 
is a likeness of the knowledge of the teacher, even as in natural things 
the form of the thing generated is a likeness of the form of the 
generator. Jerome speaks in this sense when he says [*Comment. in Daniel 
ii, 10] that "prophecy is the seal of the Divine foreknowledge." 
Consequently the same truth must needs be in prophetic knowledge and 
utterances, as in the Divine knowledge, under which nothing false can 
possibly come, as stated in the FP, Question [16], Article [8]. Therefore nothing false 
can come under prophecy.
  Reply to Objection 1: As stated in the FP, Question [14], Article [13] the certitude of the 
Divine foreknowledge does not exclude the contingency of future singular 
events, because that knowledge regards the future as present and already 
determinate to one thing. Wherefore prophecy also, which is an "impressed 
likeness" or "seal of the Divine foreknowledge," does not by its 
unchangeable truth exclude the contingency of future things.
  Reply to Objection 2: The Divine foreknowledge regards future things in two ways. 
First, as they are in themselves, in so far, to wit, as it sees them in 
their presentiality: secondly, as in their causes, inasmuch as it sees 
the order of causes in relation to their effects. And though future 
contingencies, considered as in themselves, are determinate to one thing, 
yet, considered as in their causes, they are not so determined but that 
they can happen otherwise. Again, though this twofold knowledge is always 
united in the Divine intellect, it is not always united in the prophetic  
revelation, because an imprint made by an active cause is not always on a 
par with the virtue of that cause. Hence sometimes the prophetic 
revelation is an imprinted likeness of the Divine foreknowledge, in so 
far as the latter regards future contingencies in themselves: and such 
things happen in the same way as foretold, for example this saying of Is. 
7:14: "Behold a virgin shall conceive." Sometimes, however, the prophetic 
revelation is an imprinted likeness of the Divine foreknowledge as 
knowing the order of causes to effects; and then at times the event is 
otherwise than foretold. Yet the prophecy does not cover a falsehood, for 
the meaning of the prophecy is that inferior causes, whether they be 
natural causes or human acts, are so disposed as to lead to such a 
result. In this way we are to understand the saying of Is. 38:1: "Thou 
shalt die, and not live"; in other words, "The disposition of thy body 
has a tendency to death": and the saying of Jonas 3:4, "Yet forty days, 
and Nineveh shall be destroyed," that is to say, "Its merits demand that 
it should be destroyed." God is said "to repent," metaphorically, 
inasmuch as He bears Himself after the manner of one who repents, by 
"changing His sentence, although He changes not His counsel" [*Cf. FP, 
Question [19], Article [7], ad 2].
  Reply to Objection 3: Since the same truth of prophecy is the same as the truth 
of Divine foreknowledge, as stated above, the conditional proposition: 
"If this was prophesied, it will be," is true in the same way as the 
proposition: "If this was foreknown, it will be": for in both cases it is 
impossible for the antecedent not to be. Hence the consequent is 
necessary, considered, not as something future in our regard, but as 
being present to the Divine foreknowledge, as stated in the FP, Question [14], 
Article [13], ad 2.