Old Man/New Man - Eph. 4:20-24

So what does Paul mean by the figure of the old man and new man? We are familiar with the terms, but do we know what they mean? The relation of the old man and the new man has been much disputed. Many hold that at salvation believers receive a new self, but also keep the old self. Salvation thus becomes addition, not transformation. They argue that the struggle in the Christian life comes from the battle between the two natures.