Ask — Have I judged someone wrongly?
Seek — Do you need to be reconciled to someone in your life? It might be someone in your family, a former friend, an enemy, or even God. Go to confession; through the grace of absolution, seek to trust in God more and more.
Knock — Meditate on 2 Corinthians 5:16-18. What does it mean to be a new creation? If you are a new creation, how are you different from those in the world who are not "in Christ"? How do you view others?
Transform Your Life — See the temptation to judge others or even yourself as a personal invitation to take up your cross and to trust in Christ, the friend of sinners. Pray that God will bless both you and those you might judge. Be quick to show the mercy that God shows to you to others.
(The Power of the Cross: Applying the Passion of Christ to Your Life, p. 87.)