The search for happiness is one of the chief sources of unhappiness.

艺术不是反映世界的镜子，而是塑造世界的锤子。

Writing is a way of being in the world, a way of understanding it.

I have suffered and despaired and known death and I am glad that I am in this great world.

The people are the roots of the revolution. Without the people, the revolution cannot succeed.

自适应控制的核心是从经验中学习并相应地调整控制器。