我不会为你而死，但我会把每一天都当作生命的最后一天来活。

In a rapidly changing market, the only constant is customer needs.

The only real mistake is the one from which we learn nothing.

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.