The only person you are destined to become is the person you decide to be.
数学是理性的音乐。
所有的痛苦都是痛苦。
In mathematics, the art of proposing a question must be held of higher value than solving it.
我曾经以为世界是按部落划分的。然后我以为它是按贫富划分的。然后我以为它是按愚蠢和聪明划分的。但现在我知道它是按活着的人和死去的人划分的。