The only way to deal with an unfree world is to become so absolutely free that your very existence is an act of rebellion.

Drawing for children is about capturing the essence, not the detail.

真相很少纯粹，也绝不简单。

任何农场最好的肥料是农民的足迹。

The greatest works of literature are those that combine beauty with utility.

学习人工智能的最好方法就是去做人工智能。

追求知识是一场没有终点的旅程。