He [Paul] insists that this special teaching is not the product of the intellectual activity of men; it is the gift of God and it came into the world with Jesus Christ. All our discoveries are not so much what our minds have found out as what God has told us. This by no means frees us from the responsibility of human effort. Only the student who works can make himself fit to receive the real riches of the mind of a great teacher. It is so with us and God. The more we strive to understand, the more God will tells us; and there is no limit to this process, because the riches of God are unsearchable.
William Barclay, DSB: The Letters to the Corinthians, The Westminster Press (1975), p. 27