我从不买任何东西，除非我能给自己一个充分的理由为什么要买它。

Simplicity is prerequisite for reliability.

一个只能被儿童欣赏的儿童故事根本不是一个好的儿童故事。

The great question which, in all ages, has disturbed mankind, and brought on them the greatest part of their mischiefs, has been, not whether there be power in the world, nor whence it came, but who should have it.

小人专门期望他人的恩惠，但受恩后就忘；君子则不轻易受人恩惠，若受恩于人，则必定想法图报。

学习数学的唯一方法就是做数学。

小步快跑，快速迭代。