5:8
"Be alert and of sober mind. Your enemy the devil prowls around like a roaring lion looking for someone to devour."
What you see is what you get... Who do you need to be more careful of? The person you know is obnoxious and a jerk at times or the super smooth nice guy that you would never suspect of ulterior motives? I had the opportunity to work for both in my lifetime... And believe me when I say that a super smooth will stab you in the back when you least expect it...