勤勉：不要浪费时间，只做有用的事情，戒除一切不必要的行为。

You’ll get 10x better results by elevating good behavior rather than punishing bad behavior， especially in children and animals.

I am not a fast thinker at all. I have to spend a lot of time before I can understand something.

数学中最重要的是理解概念，而不仅仅是记忆公式。

To men like that, time was a surfeit, a barrel they watched slowly drain. When really, he thinks, it’s a glowing puddle you carry in your hands; you should spend all your energy protecting it.

伟大的事情都很简单。而且大多数都可以被凝结成一个简单的单词：自由；公正；荣誉；责任；仁慈；希望。