To say God is incomprehensible is not to say that God is utterly unknowable. It is to say that none of us can comprehend God exhaustively. God reveals Himself, without revealing everything there is to know about Him. Our finitude always limits our understanding of God. We are not God but we are like Him because we bear His image and are made in His likeness. Therefore, God can reveal Himself to us, not in His language, but in our language. He can communicate to us in a manner that we can understand – no exhaustively, but truly and meaningfully.
R. C. Sproul