The ideas of economists and political philosophers， both when they are right and when they are wrong， are more powerful than is commonly understood. Indeed the world is ruled by little else. Practical men， who believe themselves to be quite exempt from any intellectual influence， are usually the slaves of some defunct economist.

理解生命的关键在于理解其组成部分之间的相互作用。

即使有天下最容易生长的植物,晒它一天,又凉它十天,没有能够长大的。比喻做事一日勤,十日怠,没有恒心,是不会成功的。

Mental life is fundamentally about adjustment to environment.