To understand others is to be knowledgeable;
To understand yourself is to be wise.
To conquer others is to have strength;
To conquer yourself is to be strong.
To know when you have enough is to be rich.
To go forward with strength is to have ambition.
To not lose your place is to last long.
To die but not be forgotten--that's true long life.
--Lao Tzu (translated from the Chinese by Robert G. Henricks)