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。