To do mathematics is to explore a universe of ideas, where the only limit is your imagination.

True competitive advantage comes from doing what others aren't willing to do.

It is one of the superstitions of the human mind to have imagined that virginity could be a virtue.

The act of writing is an act of optimism. You would not take the trouble to do it if you felt it didn't matter.

解释：善于制造弓箭的工匠之子，必须先从编织簸箕开始；善于冶炼的工匠之子，必须从连缀皮裘开始。

To kill an error is as good a service as, and sometimes even better than, the establishing of a new truth or fact.