Being powerful is like being a lady. If you have to tell people you are, you aren't.

变体：有七个原因决定了所有人类的行动：机遇、本性、强迫、习惯、理性、激情和欲望。

The end of history will be a very sad time. The struggle for recognition, the willingness to risk one's life for a purely abstract goal, the worldwide ideological struggle that called forth daring, courage, imagination, and idealism, will be replaced by economic calculation, the endless solving of technical problems, environmental concerns, and the satisfaction of sophisticated consumer demands.

The piano is like an old friend to me.