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。