Almost everyone, Christian and non-Christian alike, knows of Jesus’ teaching, “Do not judge, or you too will be judged.” (Mt 7:1). I have addresses the proper interpretation of this passage elsewhere in my treatment of judgmentalism, but I recently read some brief comments by J. P. Moreland on the matter that I found helpful as well. Moreland writes:
[W]e need to distinguish two senses of judging: condemning and evaluating. The former is wrong and is in view in Matthew 7. When Jesus says not to judge, he means it in the sense that the Pharisees judged others: their purpose was to condemn the person judged and to elevate themselves above that person. Now this is a form of self-righteous blindness that vv. 2-4 explicitly forbid. Such judgment is an expression of a habitual approach to life of avoiding self-examination and repentance and, instead, propping oneself up by putting others down.
The distinction between moral condemnation and moral evaluation is an important one. We cannot and must not avoid moral evaluations. Such are necessary and good. What we must avoid are moral condemnations of people that elevate our own sense of moral superiority and blind us to our own moral inadequacies.