The Sin of Judging.
There is a sin believers commit that we need to condemn, it is that of JUDGING other people. When we judge people it obscures our ability to discern sin in our own life and we leave the impression that we are superior! You will never become like Jesus by finding fault in or condemning others. Remember, when we point the finger at someone else there are three fingers pointing back at us! "Let him who is WITHOUT sin cast the first stone".