This Lessons begins the deep teaching of ACIM. "Forgiveness is the Key to happiness," and we need help in this process because we have been so used to a mind of "judgments" and "grievances." To imagine a mind without them seems almost impossible. This is why the Lesson says we need to learn to give up these judgments, "but from a Teacher other than yourself, Who represents the other Self in you. Through Him you learn how to forgive the self you think you made, and let it disappear. Thus you return your mind as one to Him Who is your Self, and Who can never sin." Can we do it?