Romans 3:20; Romans 12:17; Romans 14:22

Romans 3:20

20 Therefore by the deeds of the law there shall no flesh be justified in his sight: for by the law is the knowledge of sin.

Romans 12:17

17 Recompense to no man evil for evil. Provide things honest in the sight of all men.

Romans 14:22

22 Hast thou faith? have it to thyself before God. Happy is he that condemneth not himself in that thing which he alloweth.