Judge not] cp. Romans 2:1. Unkind and frivolous criticism is what is meant. Judgment as a serious and solemn act is not forbidden by Christ. It is indeed often the Christian's duty to judge and severely to condemn things which the world never thinks of judging: cp. Matthew 18:15; 1 Corinthians 5:12; 2 Timothy 4:2.
Related Commentaries of Matthew 7:1
Matthew 7:1
1 Judge not, that ye be not judged.