动力学的方程在用变分法的语言表达时是完全的。

To men like that, time was a surfeit, a barrel they watched slowly drain. When really, he thinks, it’s a glowing puddle you carry in your hands; you should spend all your energy protecting it.

世界上最大的空间就是进步的空间。

永远不要让成功冲昏头脑，也不要让失败打击心灵。

Writing fiction is like remembering things that never happened.