最伟大的知识是认清自己。

智者从敌人身上学到的比愚者从朋友身上学到的更多。

"I think that life constantly tests our ability to rise above the challenges."

To dare is to lose one's footing momentarily. Not to dare is to lose oneself.

The test of a first-rate intelligence is the ability to hold two opposed ideas in the mind at the same time, and still retain the ability to function.

Economic theory provides the tools, but real-world testing refines them.