(CG 2/11). That something is predicated of God in relation to Creatures (Book 2: God The Origin of Creatures) (Summa Contra Gentiles) (Aquinas, Thomas, St.)

These relations cannot be in God as accidents in a subject, seeing that in God there is no accident (B. I, Chap XXIII). Nor again can they be in the very substance of God: for then the substance of God in its very essence would be referred to another; but what is referred to another for its very essence, in a manner depends on that other, as it can neither be nor be understood without it; but this would make the substance of God dependent on another being, foreign to itself.

2. God is the first measure of all beings (B. I, Chap. XXVIII). He is to them as the object is to our knowledge, that is to say, its measure. But though the object is spoken of in relation to the knowledge of it, nevertheless the relation really is not in the object known, but only in the knowledge of it. The object is said to be in relation, not because it is itself related, but because something else is related to it.

3. The aforesaid relations are predicated of God, not only in respect of things that actually are, but also in respect of things that potentially are, because of them also He has knowledge, and in respect of them He is called both first being and sovereign good. But what actually is bears no real relation to what is not actually but potentially. Now God is not otherwise related to things that actually are than to things that potentially are, because he is not changed by producing anything.

4. To whatsoever is added anything fresh, the thing receiving that addition must be changed, either essentially or accidentally. Now sundry fresh relations are predicated of God, as that He is lord or ruler of this thing newly come into being. If then any relation were predicated as really existing in God, it would follow that something fresh was added to God, and therefore that He had suffered some change, either essential or accidental, contrary to what was shown above (B. I, Chapp. XXIII, XXIV)