What does the Bible say about the nature of man and sin?

Scripture reveals that all have sinned and come short of the glory of God, as stated in Romans 3:23. In Genesis, Adam was created upright but he willfully chose to disobey God, leading to the fall and the introduction of sin into the world (Romans 5:12). This has left all humanity in a state of spiritual death and corruption, dependent on God’s grace for redemption. Our sinful nature is a result of Adam’s transgression, and we inherit this corrupt seed, necessitating a new birth through Christ to restore us to fellowship with God.