心灵应作为目的本身来研究。
好奇心驱动科学,但道德必须引导它。
人生最难学的是该过哪座桥,该烧哪座桥。
A man should always consider how much he has more than he wants.
The more you love yourself, the more you can love others.
数学中最深刻的问题往往源于最简单的问题。