The only way to learn mathematics is to do mathematics.
学习数学的唯一方法就是做数学。
我们只能看到前方很短的距离，但我们可以看到那里有很多需要做的事情。
无限小在自然中的作用是无限大的。
Time doesn’t heal, it just teaches you how to live with the wound.
Simplicity is prerequisite for reliability.
The key to success is to keep growing in all areas of life - mental, emotional, spiritual, as well as physical.
公众惊人地宽容。他们可以原谅一切，除了天才。