Never run when you can walk. Always have ten good, different reasons for fighting. If you have to make excuses, what you are doing is wrong. Lies make a web, truth makes a net, and silence digs a hole.
White lies rot into black lies after two hours.
Treat your enemies as though they know all your secrets. Watch your back. Only textbooks and Heaven are ideal. Yes, Descartes, we really exist. Rules are NOT made to be broken.