The best time to start building the life you want is now.
"Dreams don't work unless you do."
I don't care what people say about me. I know who I am.
墨翟我上没有侍奉国君的差事,下没有耕田种地的艰难,我怎么敢放弃读书呢?
"When you have eliminated the impossible, whatever remains, however improbable, must be the truth."
动力学的方程在用变分法的语言表达时是完全的。