1 Corinthians 2:9, Eye Hath Not Seen
The Apostle Paul cites from this Old Testament text from book of Isaiah though not in its exact form:
Isaiah 64:4 For since the beginning of the world men have not heard, nor perceived by the ear, neither hath the eye seen, O God, beside thee, what he hath prepared for him that waiteth for him.
He tells us that the eye, the ear and the heart or mind of man cannot possibly know the way for sinful man to be reconciled to his God. God has to reveal it. Man’s wisdom, in the strength of all his senses, cannot perceive the way to God, the knowledge of salvation.