John 7:24 Jesus says: “Do not judge according to appearance, but judge righteous judgment.” What Jesus does tell us is not to judge by our own opinions, but instead judge by the word of God, that is what it means to judge righteously. He always encouraged the people to judge. God told Israel to judge the prophets in the Old Testament. He had the true prophets judge the false but the people reacted saying the very same things people are saying today. Your being negative oh you never have anything good to say. In the New Testament we are told to judge prophecy, to discern, to test the spirits and we are told to test ALL things. We are told to do this because it helps keep us away from what is false and evil. The apostle Paul showed us how to judge so there would be no second guesswork. The apostle Paul said, “If anyone preaches another gospel let him be accursed” Would anyone say to Paul's face “your judging.” In 2 Thess. 3:14-15 “And if anyone does not obey our word in this epistle, note that person and do not keep company with him, that he may be ashamed. Yet do not count him as an enemy, but admonish him as a brother.” Strong guidelines that many avoid to do today. These are done not to condemn but to bring repentance and restoration.

http://www.letusreason.org/Pent44.htm