In mathematics, you don't understand things. You just get used to them.

天文学的历史是一部视野不断扩展的历史。

The spread of liberal democracy and the integration of the world economy have created a situation in which the major powers are no longer willing to go to war with one another.

I think it's really important to have a strong sense of self and to know who you are and what you want.

"To act is to live a thousand lives, to feel a thousand hearts beating as one."

如果你没有偶尔失败，说明你还没有足够地突破界限。