Mathematics is not a careful march down a well-cleared highway, but a journey into a strange wilderness, where the explorers often get lost.

无边界即是无限的。

在探索宇宙的过程中，每一个被回答的问题都会引出更多的问题。

What we love we shall grow to resemble.

I’ve learned that you have to be strong enough to stand alone, smart enough to know when you need help, and brave enough to ask for it.