I'm doing a bit of a review of philosophical systems... At one end being the logic and reason of Critical thinking, in the middle are logical problems with "accepted" answers, and at the other end "philosophies" that may be accepted as true but are hard to logically prove. These would probably be considered ethics or morality - ways to live one's life.
Going back to Ma'at you have the things you aren't supposed to do or the things you are supposed to do that are often called virtues. There would be the Maxims of Delphi. It seems to me though that Stoic philosophy such as described by Zeno of Citium, Marcus Aurelius, etc. is rather an unusual example... which probably is just a reflection of my limited knowledge.
Could you perhaps suggest any other analogous philosophical systems?