数学中最深刻的问题往往源于最简单的问题。

Failure is instructive. The person who really thinks learns quite as much from his failures as from his successes.

作家的快乐在于思想能化作情感，而情感能完全化作思想。

我是个斗士。我相信积极的一面。我相信努力工作。