(A smile) costs nothing, but creates much.
Happiness doesn't depend on any external conditions, it is governed by our mental attitude.
The most important thing in life is not simply to capitalize on your gains. Any fool can do that. The important thing is to profit from your losses. That requires intelligence, and makes the difference between a man of sense and a fool.
Monotony reveals our limitations.
The essence of all art is to have pleasure in giving pleasure.
Remember, today is the tomorrow you worried about yesterday.