Judge not, that ye be not judged.
For with what judgement ye judge, ye shall be judged: and with what measure ye mete, it shall be measured to you again.
Matthew 7:1-2
These are the words of Jesus himself, from the Sermon on the Mount, as related by the disciple Matthew. One of the reasons I can no longer be a Christian is because so many who call themselves such choose to ignore passages like this, and simply use their religion as a cloak to excuse and sanctify their own narrow-minded bigotry.
But I do not quote these words to you as religious instruction. I offer them as a pragmatic observation on how to get along with people. One of the beauties of Matthew 7 is that most of it is not really about religion, but simple practical advice on living together in a community.
RE: Never Judge People