William Burkitt on Luke 6:37

This prohibition, Judge not, is not to be understood of ourselves, but our neighbors. Self-judging is a great and necessary duty; rash judging of others is an heinous and grievous sin, which exposes to the righteous judgment of God. It is private judging and private condemning of persons which God forbids; it follows, forgive, and ye shall be forgiven. Not that a bare forgiving of others is all that God requires in order to your forgiveness, but it is one part of that obedience which we owe to God, without which it is in vain to expect forgiveness from God: Forgive and ye shall be forgiven. Matt 7:1