that which is natural.

Romans 6:6
We know that our old self was crucified with Him so that the body of sin might be rendered powerless, that we should no longer be slaves to sin.

Ephesians 4:22-24
to put off your former way of life, your old self, which is being corrupted by its deceitful desires; . . .

Colossians 3:9, 10
Do not lie to one another, since you have taken off the old self with its practices, . . .