that which is natural
Romans 6:6
Knowing this, that our old man is crucified with him, that the body of sin might be destroyed, that henceforth we should not serve sin.
Ephesians 4:22-24
22
That ye put off concerning the former conversation the old man, which is corrupt according to the deceitful lusts;
23
And be renewed in the spirit of your mind;
24
And that ye put on the new man, which after God is created in righteousness and true holiness.
Colossians 3:9
Lie not one to another, seeing that ye have put off the old man with his deeds;
Colossians 3:10
And have put on the new man, which is renewed in knowledge after the image of him that created him: