Personal law is simply the thought that controls your mind and your life more than any other thought. Finding that thought is the most valuable knowledge that you can have about yourself. It is like the leverage on personal change. It enables you to change very efficiently.
The way to work with a bully is to take the ball and go home. First time every time. When there's no ball there's no game. Bullies hate that. So they'll either behave so they can play with you or they'll go bully someone else.