The true test of a society is how it treats its most vulnerable members.
It is remarkable that a science which began with the consideration of games of chance should have become the most important object of human knowledge.
事理明白则心愈能清楚而专一,心能专一则事理愈能通达流畅。
一个好的数学家是懒惰的,但要以建设性的方式。