Happiness is a good flow of life； the conviction that you are taking part in the universe's purpose.

点燃蜡烛的同时也投下了阴影。

Only by mastering core technologies can we control our own destiny.

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.