Psalm 101:7 ASV

In Psalm 101 is just seems David at this time is being very judgemental about the sinners but all I can think is he knows how weak he is so he wants to stay as far away from them as possible because he knows how easy it would be for him to join in.
Still we are all like him, constantly judging others for their sins and we are not the judge. We are no better than those who judged the adultress when Jesus wrote in the dirt.