Don't date because you are desperate.
Don't marry because you are miserable.
Don't have kids because you think your genes are superior.
Don't philander because you think you are irresistible.
Don't associate with people you can't trust.
Don't cheat. Don't lie. Don't pretend.
Don't dictate because you are smarter.
Don't demand because you are stronger.
Do not look where you fell. Look where you slipped.
The story is told of a king in Africa who had a close friend with whom he grew up. The friend had a habit of looking at every situation that ever occurred in his life (positive or negative) and remarking, "This is good!"
"Knowledge is a garden. If it isn't cultivated, you can't harvest it."
Fate handed the quitter a bump, and he dropped;