We teach a subject not to produce little living libraries on that subject, but rather to get a student to think mathematically for himself.

"The books that the world calls immoral are books that show the world its own shame."

I have learned to seek my happiness by limiting my desires， rather than in attempting to satisfy them.

Happiness is secured through virtue； it is a good attained by man's own will.

对抗病毒是一场持续的战斗，科学必须始终领先一步。

沙漠教会你水的价值和沉默的意义。