所以君子严于律己、宽以待人，而平庸的人却宽以待己、严于律人。

数学的本质在于它的自由。

为明天做的最好准备就是今天做到最好。

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

I'm interested in the weak materials, the materials that people don't think can be used for permanent structures.

"The best literature challenges us to see the world differently."

凡是存在的事物就天然具有合理性。