数学的目标不是解决问题，而是理解问题。
The goal of mathematics is not to solve problems, but to understand them.
历史的终结将是一个非常悲伤的时刻。为纯粹抽象目标而奋斗、愿意冒生命危险的斗争，以及激发勇气、想象力、理想主义的全球意识形态斗争，将被经济计算、无休止的技术问题解决、环境关注和复杂消费需求的满足所取代。
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.
Patriotism is not a choice, but a duty.
可持续性不是一种趋势，而是生存的必需。
People always say that you can't please everybody. I think that's a cop-out. Why not attempt it?
Every book is a kind of journey, and every journey changes you.
"The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion."