Our experience tends to confirm a long-held notion that being prepared, on a few occasions in a lifetime, to act promptly in scale, in doing some simple and logical thing, will often dramatically improve the financial results of that lifetime.

数学中的每个问题都是一个等待解决的谜题，而乐趣就在于解决的过程。

Writing for children is a responsibility—they deserve the truth, even when it's hard.

我是那种会让你想打你妈妈的人。

Good habits shape an excellent life.