That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts; and be renewed in the spirit of your mind; – Ephesians 4:22-23
We are commanded here to actively dismantle the “old man,” our old sinful nature. We are to willingly submit to God renewing our minds and strengthening the new man. Notice that “lusts” (fleshly desires) are “deceitful” and lead to a corrupt conversation. Note that “conversation” as used here is an older English term meaning “conduct of lifestyle.”