What does the Bible say about the new man in Christ?

The new man, according to Ephesians 4:17-24, represents a transformation within an individual who is born again by the Spirit of God. This new creature is characterized by a renewed nature that desires to live in righteousness and holiness, reflecting the image of Christ. Paul speaks of putting off the old man, which is corrupt and deceived, and putting on the new man, created in righteousness. This transformation is both a present reality and a hopeful promise for believers in their walk with God.