I can tell you that pointing out other people’s sins is probably the rudest, most arrogant, and self-righteous thing a person can do. Who wants somebody like that around? And that leads me to another question: are you just supposed to do what the bible says whether it is welcome to the other person or not? You may think you are being loving–the person may believe you are being an ass. Unfortunately for you, it is the other person’s understanding of the encounter that matters. I am pretty sure that the bible doesn’t say anywhere that God expects you to be an arrogant, self-righteous ass, though many Christians are.