黑洞不仅仅是宇宙的真空吸尘器；它们是测试我们物理理论极限的终极实验室。

To write is to confront the void.

The brain is like a muscle. When it is in use we feel very good. Understanding is joyous.

The only service a friend can really render is to keep up your courage by holding up to you a mirror in which you can see a noble image of yourself.

My stomach is a knot of sorrow and anger, but I keep smiling.

快乐不在于占有这个人。快乐在于此。房间里有了另一个竞争者。