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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