Once a novice came to Abba Dorotheus....

Once a novice came to Abba Dorotheus and asked: “Father, how can I fulfill the commandment "do not judge”? If I see that my brother has lied, should I assume that he did the right thing anyway?

In response, he heard from the elder: “If you say: "My brother lied,” you will tell the truth. But if you say, "My brother is a liar," then you condemned him. For this is a condemnation of the very disposition of his soul, the pronouncement of a sentence about his whole life. And the abba added: and the sin of condemnation, in comparison with any other sin, is a log and a speck according to the parable of Christ.