When you have committed an action that you cannot bear to think about, that causes you to writhe in retrospect, do not seek to evade the memory: make yourself relive it, confront it repeatedly over and over, till finally, you will discover, through sheer repetition it loses its power to pain you. It works, I guarantee you, this sure-fire guilt-eradicator, like a homeopathic medicine - like in small doses applied to like. It works, but I am not sure that it is a good thing.