For some people, the most difficult thing in the world is to ask for forgiveness.
If you find it difficult to ask for forgiveness, visualize yourself asking for forgiveness. Mentally see yourself approaching someone and saying, “I am sorry that I caused you pain. Please forgive me.” Rerun this picture in your mind over and over again. Feel a sense of strength and release at being able to do this.
Each time you ask for forgiveness and find it difficult, you are building up your inner resource of courage.
-from Rabbi Zelig Pliskin’s book, “Courage”