These are great and wonderful Stoic principals to keep in mind. You could call them rules but in Stoicism there really are not rules
It is a sin to pursue pleasure as a good and to avoid pain as a evil.
How much better to heal than seek revenge from injury. Vengeance wastes a lot of time and exposes you to many more injuries than the first that sparked it. Anger always outlasts hurt. Best to take the opposite course. — Seneca
“If anyone can refute me—show me I’m making a mistake or looking at things from the wrong perspective—I’ll gladly change. It’s the truth I’m after, and the truth never harmed anyone.” – Marcus Aurelius