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I think prime numbers are like life. They are very logical but you could never work out the rules, even if you spent all your time thinking about them.

不被榮譽(yù)誘惑，不被誹謗嚇退，遵循道義行事，認(rèn)真端正自己。

Walls define space, but openings connect it to the world.

我不知道什么更緊，是我的牛仔褲還是我的安保。

The mind is to be studied as an end in itself.

The less secure a man is, the more likely he is to have extreme prejudice.