Neither, on the other hand, are names applied to God and creatures in a purely equivocal sense, as some have said. Because if that were so, it follows that from creatures nothing could be known or demonstrated about God at all; for the reasoning would always be exposed to the fallacy of equivocation. Such a view is against the philosophers, who proved many things about God, and also against what the Apostle says: "The invisible things of God are clearly seen being understood by the things that are made" (Rom. 1:20). Therefore it must be said that these names are said of God and creatures in an analogous sense, i.e. according to proportion.
Now names are thus used in two ways: either according as many things are proportionate to one, thus for example "healthy" predicated of medicine and urine in relation and in proportion to health of a body, of which the former is the sign and the latter the cause: or according as one thing is proportionate to another, thus "healthy" is said of medicine and animal, since medicine is the cause of health in the animal body. And in this way some things are said of God and creatures analogically, and not in a purely equivocal nor in a purely univocal sense. For we can name God only from creatures (A. 1). Thus whatever is said of God and creatures, is said according to the relation of a creature to God as its principle and cause, wherein all perfections of things pre-exist excellently. Now this mode of community of idea is a mean between pure equivocation and simple univocation. For in analogies the idea is not, as it is in univocals, one and the same, yet it is not totally diverse as in equivocals; but a term which is thus used in a multiple sense signifies various proportions to some one thing; thus "healthy" applied to urine signifies the sign of animal health, and applied to medicine signifies the cause of the same health.
Reply Obj. 1: Although equivocal predications must be reduced to univocal, still in actions, the non-univocal agent must precede the univocal agent. For the non-univocal agent is the universal cause of the whole species, as for instance the sun is the cause of the generation of all men; whereas the univocal agent is not the universal efficient cause of the whole species (otherwise it would be the cause of itself, since it is contained in the species), but is a particular cause of this individual which it places under the species by way of participation. Therefore the universal cause of the whole species is not an univocal agent; and the universal cause comes before the particular cause. But this universal agent, whilst it is not univocal, nevertheless is not altogether equivocal, otherwise it could not produce its own likeness, but rather it is to be called an analogical agent, as all univocal predications are reduced to one first non-univocal analogical predication, which is being.
Reply Obj. 2: The likeness of the creature to God is imperfect, for it does not represent one and the same generic thing (Q. 4, A. 3).
Reply Obj. 3: God is not the measure proportioned to things measured; hence it is not necessary that God and creatures should be in the same genus.
The arguments adduced in the contrary sense prove indeed that these names are not predicated univocally of God and creatures; yet they do not prove that they are predicated equivocally. _______________________
SIXTH ARTICLE [I, Q. 13, Art. 6]
Whether Names Predicated of God Are Predicated Primarily of Creatures?
Objection 1: It seems that names are predicated primarily of creatures rather than of God. For we name anything accordingly as we know it, since "names", as the Philosopher says, "are signs of ideas." But we know creatures before we know God. Therefore the names imposed by us are predicated primarily of creatures rather than of God.
Obj. 2: Further, Dionysius says (Div. Nom. i): "We name God from creatures." But names transferred from creatures to God, are said primarily of creatures rather than of God, as "lion," "stone," and the like. Therefore all names applied to God and creatures are applied primarily to creatures rather than to God.