The worst evils in history have always been committed by those who truly believed they were combating evil. Beware of combating evil.

世界上最好和最美丽的东西是看不见甚至摸不到的 - 它们必须用心去感受。

最好的投资是投资自己。你学得越多，赚得越多。

数学的语言是宇宙的语言，通过学习它，我们可以理解宇宙。