Beauty is only skin deep - you shouldn't care about what a person looks like because it's only the outside. Personality and good morals are what truly matters. Pretty on the outside but still have an 'ugly' heart (mind) soul.
Not my circus. Not my monkeys. (Polish proverb) Every time you feel yourself getting drawn into other people's nonsense, repeat these words. Great to remember, because I am trying to not get sucked into peoples drama