The most important thing in mathematics is to understand the concepts, not just to memorize the formulas.
"To be a writer, one must have a certain arrogance, a belief that what one has to say is important enough for others to hear."
通往善的道路就是通往真理的道路。
没有一个社会能够真正繁荣和幸福,其中大多数成员都贫困和痛苦。