God’s attributes are not God; that is, I say that God is self-existent, but that’s something that I posit about God—that isn’t God. I say that God is holy, but holiness is not God. I say that God is wisdom, but wisdom is not God. God is God!
Would you like a definition of attribute as I shall use it? It is something which God has declared to be true of Himself. And one thing God has declared to be true of Himself is, “I AM THAT I AM”—I exist. Not “I will exist,” or “I did exist,” but “I do exist.” The philosophy of existentialism begins with the propositions “I exist” and “There is no God.” But the Christian believes that God is the original existence, that He said “I AM.” And because God is, everything else that is, is.
A W Tozer. The Attributes of God, Vol. 2