What does the Bible say about the spiritual blindness of man?

According to the Scriptures, man is born spiritually blind and unable to comprehend the things of God. This blindness is a result of sin, which clouds the understanding and creates a lack of desire for spiritual truth (2 Corinthians 4:4). Jesus referred to this condition when describing why people do not come to Him, stating that their eyes have not been opened to the glory of God in Christ. It is essential to recognize that spiritual sight can only be granted by the grace of God, as evidenced in 1 Corinthians 2:14 where it says, 'The natural man receives not the things of the Spirit of God; for they are foolishness to him.' Thus, one’s understanding of spiritual matters is contingent on God’s revelation, similar to the way Jesus healed the man born blind.