True strength comes from overcoming the obstacles we thought we couldn't get past.

纯粹自然状态的条件...是每个人对每个人的战争状态。

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.

It's sort of sad when you think of a kid like that going through life without a sense of humor...