Summa Theologica Part I (Prima Pars) Part 28
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Therefore there are not in G.o.d ideas of all things known by Him.
Obj. 3: Further, G.o.d knows primary matter, of which there can be no idea, since it has no form. Hence the same conclusion.
Obj. 4: Further, it is certain that G.o.d knows not only species, but also genera, singulars, and accidents. But there are not ideas of these, according to Plato's teaching, who first taught ideas, as Augustine says (Octog. Tri. Quaest. qu. xlvi). Therefore there are not ideas in G.o.d of all things known by Him.
_On the contrary,_ Ideas are types existing in the divine mind, as is clear from Augustine (Octog. Tri. Quaest. qu. xlvi). But G.o.d has the proper types of all things that He knows; and therefore He has ideas of all things known by Him.
_I answer that,_ As ideas, according to Plato, are principles of the knowledge of things and of their generation, an idea has this twofold office, as it exists in the mind of G.o.d. So far as the idea is the principle of the making of things, it may be called an "exemplar," and belongs to practical knowledge. But so far as it is a principle of knowledge, it is properly called a "type," and may belong to speculative knowledge also. As an exemplar, therefore, it has respect to everything made by G.o.d in any period of time; whereas as a principle of knowledge it has respect to all things known by G.o.d, even though they never come to be in time; and to all things that He knows according to their proper type, in so far as they are known by Him in a speculative manner.
Reply Obj. 1: Evil is known by G.o.d not through its own type, but through the type of good. Evil, therefore, has no idea in G.o.d, neither in so far as an idea is an "exemplar" nor as a "type."
Reply Obj. 2: G.o.d has no practical knowledge, except virtually, of things which neither are, nor will be, nor have been. Hence, with respect to these there is no idea in G.o.d in so far as idea signifies an "exemplar" but only in so far as it denotes a "type."
Reply Obj. 3: Plato is said by some to have considered matter as not created; and therefore he postulated not an idea of matter but a concause with matter. Since, however, we hold matter to be created by G.o.d, though not apart from form, matter has its idea in G.o.d; but not apart from the idea of the composite; for matter in itself can neither exist, nor be known.
Reply Obj. 4: Genus can have no idea apart from the idea of species, in so far as idea denotes an "exemplar"; for genus cannot exist except in some species. The same is the case with those accidents that inseparably accompany their subject; for these come into being along with their subject. But accidents which supervene to the subject, have their special idea. For an architect produces through the form of the house all the accidents that originally accompany it; whereas those that are superadded to the house when completed, such as painting, or any other such thing, are produced through some other form. Now individual things, according to Plato, have no other idea than that of species; both because particular things are individualized by matter, which, as some say, he held to be uncreated and the concause with the idea; and because the intention of nature regards the species, and produces individuals only that in them the species may be preserved. However, divine providence extends not merely to species; but to individuals as will be shown later (Q. 22, A. 3).
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QUESTION 16
OF TRUTH (In Eight Articles)
Since knowledge is of things that are true, after the consideration of the knowledge of G.o.d, we must inquire concerning truth. About this there are eight points of inquiry:
(1) Whether truth resides in the thing, or only in the intellect?
(2) Whether it resides only in the intellect composing and dividing?
(3) On the comparison of the true to being.
(4) On the comparison of the true to the good.
(5) Whether G.o.d is truth?
(6) Whether all things are true by one truth, or by many?
(7) On the eternity of truth.
(8) On the unchangeableness of truth.
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FIRST ARTICLE [I, Q. 16, Art. 1]
Whether Truth Resides Only in the Intellect?
Objection 1: It seems that truth does not reside only in the intellect, but rather in things. For Augustine (Soliloq. ii, 5) condemns this definition of truth, "That is true which is seen"; since it would follow that stones hidden in the bosom of the earth would not be true stones, as they are not seen. He also condemns the following, "That is true which is as it appears to the knower, who is willing and able to know," for hence it would follow that nothing would be true, unless someone could know it. Therefore he defines truth thus: "That is true which is." It seems, then, that truth resides in things, and not in the intellect.
Obj. 2: Further, whatever is true, is true by reason of truth. If, then, truth is only in the intellect, nothing will be true except in so far as it is understood. But this is the error of the ancient philosophers, who said that whatever seems to be true is so.
Consequently mutual contradictories seem to be true as seen by different persons at the same time.
Obj. 3: Further, "that, on account of which a thing is so, is itself more so," as is evident from the Philosopher (Poster. i). But it is from the fact that a thing is or is not, that our thought or word is true or false, as the Philosopher teaches (Praedicam. iii). Therefore truth resides rather in things than in the intellect.
_On the contrary,_ The Philosopher says (Metaph. vi), " The true and the false reside not in things, but in the intellect."
_I answer that,_ As the good denotes that towards which the appet.i.te tends, so the true denotes that towards which the intellect tends. Now there is this difference between the appet.i.te and the intellect, or any knowledge whatsoever, that knowledge is according as the thing known is in the knower, whilst appet.i.te is according as the desirer tends towards the thing desired. Thus the term of the appet.i.te, namely good, is in the object desirable, and the term of the intellect, namely true, is in the intellect itself. Now as good exists in a thing so far as that thing is related to the appet.i.te--and hence the aspect of goodness pa.s.ses on from the desirable thing to the appet.i.te, in so far as the appet.i.te is called good if its object is good; so, since the true is in the intellect in so far as it is conformed to the object understood, the aspect of the true must needs pa.s.s from the intellect to the object understood, so that also the thing understood is said to be true in so far as it has some relation to the intellect.
Now a thing understood may be in relation to an intellect either essentially or accidentally. It is related essentially to an intellect on which it depends as regards its essence; but accidentally to an intellect by which it is knowable; even as we may say that a house is related essentially to the intellect of the architect, but accidentally to the intellect upon which it does not depend.
Now we do not judge of a thing by what is in it accidentally, but by what is in it essentially. Hence, everything is said to be true absolutely, in so far as it is related to the intellect from which it depends; and thus it is that artificial things are said to be true as being related to our intellect. For a house is said to be true that expresses the likeness of the form in the architect's mind; and words are said to be true so far as they are the signs of truth in the intellect. In the same way natural things are said to be true in so far as they express the likeness of the species that are in the divine mind. For a stone is called true, which possesses the nature proper to a stone, according to the preconception in the divine intellect. Thus, then, truth resides primarily in the intellect, and secondarily in things according as they are related to the intellect as their principle. Consequently there are various definitions of truth.
Augustine says (De Vera Relig. x.x.xvi), "Truth is that whereby is made manifest that which is;" and Hilary says (De Trin. v) that "Truth makes being clear and evident" and this pertains to truth according as it is in the intellect. As to the truth of things in so far as they are related to the intellect, we have Augustine's definition (De Vera Relig. x.x.xvi), "Truth is a supreme likeness without any unlikeness to a principle": also Anselm's definition (De Verit. xii), "Truth is rightness, perceptible by the mind alone"; for that is right which is in accordance with the principle; also Avicenna's definition (Metaph.
viii, 6), "The truth of each thing is a property of the essence which is immutably attached to it." The definition that "Truth is the equation of thought and thing" is applicable to it under either aspect.
Reply Obj. 1: Augustine is speaking about the truth of things, and excludes from the notion of this truth, relation to our intellect; for what is accidental is excluded from every definition.
Reply Obj. 2: The ancient philosophers held that the species of natural things did not proceed from any intellect, but were produced by chance. But as they saw that truth implies relation to intellect, they were compelled to base the truth of things on their relation to our intellect. From this, conclusions result that are inadmissible, and which the Philosopher refutes (Metaph. iv). Such, however, do not follow, if we say that the truth of things consists in their relation to the divine intellect.
Reply Obj. 3: Although the truth of our intellect is caused by the thing, yet it is not necessary that truth should be there primarily, any more than that health should be primarily in medicine, rather than in the animal: for the virtue of medicine, and not its health, is the cause of health, for here the agent is not univocal. In the same way, the being of the thing, not its truth, is the cause of truth in the intellect. Hence the Philosopher says that a thought or a word is true "from the fact that a thing is, not because a thing is true."
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SECOND ARTICLE [I, Q. 16, Art. 2]
Whether Truth Resides Only in the Intellect Composing and Dividing?
Objection 1: It seems that truth does not reside only in the intellect composing and dividing. For the Philosopher says (De Anima iii) that as the senses are always true as regards their proper sensible objects, so is the intellect as regards "what a thing is." Now composition and division are neither in the senses nor in the intellect knowing "what a thing is." Therefore truth does not reside only in the intellect composing and dividing.
Obj. 2: Further, Isaac says in his book _On Definitions_ that truth is the equation of thought and thing. Now just as the intellect with regard to complex things can be equated to things, so also with regard to simple things; and this is true also of sense apprehending a thing as it is. Therefore truth does not reside only in the intellect composing and dividing.
_On the contrary,_ the Philosopher says (Metaph. vi) that with regard to simple things and "what a thing is," truth is "found neither in the intellect nor in things."
_I answer that,_ As stated before, truth resides, in its primary aspect, in the intellect. Now since everything is true according as it has the form proper to its nature, the intellect, in so far as it is knowing, must be true, so far as it has the likeness of the thing known, this being its form, as knowing. For this reason truth is defined by the conformity of intellect and thing; and hence to know this conformity is to know truth. But in no way can sense know this. For although sight has the likeness of a visible thing, yet it does not know the comparison which exists between the thing seen and that which itself apprehends concerning it. But the intellect can know its own conformity with the intelligible thing; yet it does not apprehend it by knowing of a thing "what a thing is." When, however, it judges that a thing corresponds to the form which it apprehends about that thing, then first it knows and expresses truth. This it does by composing and dividing: for in every proposition it either applies to, or removes from the thing signified by the subject, some form signified by the predicate: and this clearly shows that the sense is true of any thing, as is also the intellect, when it knows "what a thing is"; but it does not thereby know or affirm truth. This is in like manner the case with complex or non-complex words. Truth therefore may be in the senses, or in the intellect knowing "what a thing is," as in anything that is true; yet not as the thing known in the knower, which is implied by the word "truth"; for the perfection of the intellect is truth as known. Therefore, properly speaking, truth resides in the intellect composing and dividing; and not in the senses; nor in the intellect knowing "what a thing is."
And thus the Objections given are solved.
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THIRD ARTICLE [I, Q. 16, Art. 3]
Whether the True and Being Are Convertible Terms?
Objection 1: It seems that the true and being are not convertible terms. For the true resides properly in the intellect, as stated (A. 1); but being is properly in things. Therefore they are not convertible.
Obj. 2: Further, that which extends to being and not-being is not convertible with being. But the true extends to being and not-being; for it is true that what is, is; and that what is not, is not.
Therefore the true and being are not convertible.
Obj. 3: Further, things which stand to each other in order of priority and posteriority seem not to be convertible. But the true appears to be prior to being; for being is not understood except under the aspect of the true. Therefore it seems they are not convertible.
_On the contrary,_ the Philosopher says (Metaph. ii) that there is the same disposition of things in being and in truth.
_I answer that,_ As good has the nature of what is desirable, so truth is related to knowledge. Now everything, in as far as it has being, so far is it knowable. Wherefore it is said in _De Anima_ iii that "the soul is in some manner all things," through the senses and the intellect. And therefore, as good is convertible with being, so is the true. But as good adds to being the notion of desirable, so the true adds relation to the intellect.
Reply Obj. 1: The true resides in things and in the intellect, as said before (A. 1). But the true that is in things is convertible with being as to substance; while the true that is in the intellect is convertible with being, as the manifestation with the manifested; for this belongs to the nature of truth, as has been said already (A.
Summa Theologica Part I (Prima Pars) Part 28
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Summa Theologica Part I (Prima Pars) Part 28 summary
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