It is impossible to live without failing at something, unless you live so cautiously that you might as well not have lived at all.

The most profound truths are often the simplest.

为了发现什么是真实的，值得活下去。

成功的真正标准是我们对多少人的生活产生了积极影响，而不仅仅是收入数字。

我年青时以为金钱至上，而今年事已迈，发现果真如此。

学习数学的唯一方法就是做数学。