“But we are drunk with the false opinion of our own insight and are thus extremely reluctant to admit that it is utterly blind and stupid in divine matters. Hence, it will be more effective, I believe, to prove this fact by Scriptural testimonies than by reasons. John very beautifully teaches it in a passage that I have previously quoted; he writes that: “Life was in God from the beginning and that life was the light of men; this light shines in the darkness, but the darkness comprehends it not” [John 1:4-5]. He shows that man’s soul is so illumined by the brightness of God’s light as never to be without some slight flame or at least a spark of it; but that even with this illumination it does comprehend God. Why is this? Because man’s keenness of mind is mere blindness as far as the knowledge of God is concerned. For when the Spirit calls men “darkness,” he at once denies them any ability of spiritual understanding. Therefore he declares that those believers who embrace Christ are “born not of blood nor of the will of the flesh nor of the will of man, but of God” [John 1:13]. This means: Flesh is not capable of such lofty wisdom as to conceive God and what is God’s, unless it be illumined by the Spirit of God. As Christ testified, the fact that Peter recognized him was a special revelation of the Father [Matt. 16:17].”
All that to say: Regeneration precedes Faith and any understanding of spiritual things at all. God must open our eyes, our ears, open our minds and hearts if we are to ascend to the demands for understanding, true spiritual illumination, faith, and repentance in the Scriptures. What God commands of us He gives in Jesus Christ, including the very faith and knowledge to believe in Him. Therefore, anyone attempting to ascend to understand God of himself and his own devices will completely fail in this endeavor, for knowledge about God is revealed by God Himself. Darkness cannot reveal and ascent to the light. Rather the light illumines the darkness and causes it to flee from its presence. So it is with the Lord.