Thou wilt keep him in perfect peace, whose mind is stayed on thee: because he trusteth in thee. (Isaiah 26:3 KJV)
This verse was given to my wife years ago by a dear and valued Friend. Through the years it became a guidon which I try to wear every day.
If you can live by that, the devil will have no chance to afflict you with any nasty habits, prejudices, fears and pride. Try it.
Let me know if you have success with it. Do you have a favorite verse that means as much to you? Share it here.