I have been puzzled that some scriptures command us not to judge and others instruct us that we should judge and even tell us how to do it. I am convinced that these seemingly contradictory directions are consistent when we view them with the perspective of eternity. The key is to understand that there are two kinds of judging: final judgments, which we are forbidden to make; and intermediate judgments, which we are directed to make, but upon righteous principles.
You are sent out as shepherds to gather the sheep together; and remember that they are not your sheep: they belong to HIM that sends you. Then do not make a choice of any of those sheep; do not make selections before they are brought home and put into the fold.
At best, man can judge only what he sees; he cannot judge the heart or the intention, or begin to judge the potential of his neighbor.