Esau exercised something incredible. In Genesis 33 we see the reconciliation of two brothers. Esau was cheated out of his rightful blessing by deception and trickery. Jacob should have run up to Esau and apologized. But Esau did not wait for that. He forgave him,, period. That is powerful.
I remember a time when I was offended by an action. The person that offended me had not apologized, but I felt the need to forgive him. But it made sense to me to first let him know that I had been offended, otherwise an "I forgive you" coming out of the blue might not make sense. But when I brought that up, I discovered that he had already forgiven me. (I had offended him, which is probably why he acted in a way that offended me) He made the choice to love and forgive me. That was cool. Keeping anger and unforgiveness "alive" is a bad thing that just festers.