Good means not merely not to do wrong, but rather not to desire to do wrong.
The most exciting moments in mathematics are when you discover that two seemingly unrelated areas are deeply connected.
在私利面前能够想到道义,遇到危难能够挺身而出,虽然长期生活在贫困之中,也没有忘记平生的诺言,这样就可以说是一个十全十美的人了。