Learn this and learn it well - from ACIM

T-31. III. 1. Only the self-accused condemn. As you prepare to make a choice that will result in different outcomes, there is first one thing that must be overlearned. It must become a habit of response so typical of everything you do that it becomes your first response to all temptation, and to every situation that occurs. Learn this, and learn it well, for it is here delay of happiness is shortened by a span of time you cannot realize. You never hate your brother for his sins, but only for your own. Whatever form his sins appear to take, it but obscures the fact that you believe them to be yours, and therefore meriting a “just” attack.