Happiness ain't a thing in itself --- it's only a contrast with something that ain't pleasant. That's all it is.
快乐的情感是来源于与不好的事的对比，而快乐本身并没有任何意义。
数学是理性的音乐。
Freedom is not a condition, but an attitude.
译文：严以律己是做人的根本，要想守住已成就的事业就要时刻记住创业时的艰辛。赏析：以责人之心责己，以恕己之心恕人，人生很多祸患就会减少。处处苛责别人而宽恕自己，是不能服众的，只会让双方的矛盾加深。人在富贵发达后，要有居安思危的意识，只有这样，才能永远保住辛苦创下的家业。
I don't want to make money, I want to make a difference.
Every tree planted today is a legacy for generations we will never meet.
