数学的美在于它能够用一种既精确又普遍的语言来描述宇宙。

社会的进步取决于每个人的努力。

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.

All that is in motion must be at peace； it is not what is at rest that should be considered peaceful.