I have been a selfish being all my life, in practice, though not in principle.

Don't be defined by what you didn't know or didn't do.

The most dangerous phrase in business is: "We've always done it this way."

中心地的等级越高，其数量越少，影响范围越大。

If you don’t take risks, you’ll always work for someone who does.

如果不能满足农民的需求，最先进的技术也毫无价值。#