Life is a series of choices, and every choice has a consequence.

乐观是为创造更美好未来的一种策略

最伟大的定理往往来自于对显而易见之事的质疑。

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.