What does the Bible say about human ability to know God?

Scripture clearly indicates that human beings, in their natural state, lack the ability to know God and have a relationship with Him. John 1:13 states that those who receive Christ are born not of blood, nor of the will of the flesh, nor of the will of man, but of God. This underscores the necessity of God's intervention in revealing Himself to humanity. Without this divine revelation, individuals cannot grasp the true nature of God or come to a saving knowledge of Him. Indeed, Jesus Himself affirmed this when He told Peter that his confession of faith was revealed by the Father in heaven (Matthew 16:17). Thus, it is solely through God's grace that anyone is able to recognize and worship Him.