No one has properly learned wisdom who does not obey God. Wisdom that does not lead to obedience is a fiction, a fraud.
Left alone, I could not tell you anything about what it is to know God, and to be guided by him. Before conversion, what human being knows anything about God? What living man has ever investigated heaven, or known his work? The only way we can know anything about him or how we should live is by listening to him. If we were to ask questions such as, ‘Is there any hope for me?’, ‘How do I approach God?’, ‘Can God look with favour on such a one as me?’, then we cannot answer from our own imaginations. The answers must come from heaven, out of God’s own mouth, otherwise what value would they have, and why should we trust them.
The realisation that God is so much higher than they understood causes the soul to be shocked, and shows them the great distance between the sinner and God. How can that gulf ever be crossed? Only by the Lord condescending to come down to us and carry us back into glory. The returning backslider must make no claims for himself other than that he deserves nothing from the Lord. This is what qualifies him to call on the name of the Lord.