We are not rich by what we possess but by what we can do without.
决定我们是否富有的，不是我们拥有的东西，而是我们没有也行的东西。
I would not dare to say that there is a direct relation between mathematics and madness, but there is no doubt that great mathematicians suffer from maniacal characteristics.
I’m not trying to be perfect, I’m just trying to be better.
美不是事物本身的品质：它存在于凝视它们的头脑中。