Never complain and never explain.
Who seeks shall find.
Quality is not an act, it is a habit.
Know or listen to those who know.
You never know what motivates you.
Things do not happen. Things are made to happen.
To be a good loser is to learn how to win.
Leap, and the net will appear.
It's always too early to quit.
Expect problems and eat them for breakfast.
Diversity in the world is a basic characteristic of human society, and also the key condition for a lively and dynamic world as we see today.