建立习惯的目的，是不用自我谈判，不在决定做一件事上花费精力，你直接就做了。好的习惯包括讲真话、用牙线。
The purpose of a habit is to remove that action from self-negotiation. You no longer expend energy deciding whether to do it. You just do it. Good habits can range from telling the truth， to flossing
Mathematics is not just about numbers, equations, computations, or algorithms: it is about understanding.
记忆是我们以为已经忘记的东西；也是我们以为会记住的东西。
"The magic of cinema lies in the shadows."