I think the most important thing in life is to be able to look at yourself in the mirror and like what you see.

The only real prison is the one you build for yourself.

在数学中，提出问题的艺术必须比解决问题更有价值。

The value of life lies not in the length of days，but in the use we make of them.

宇宙是一个相当大的地方。如果只有我们，那似乎是对空间的极大浪费。