The only source of knowledge is experience.
政策规则优于自由裁量，因为它们消除了时间不一致性问题。
"If you can’t fly, then run. If you can’t run, then walk. If you can’t walk, then crawl. But whatever you do, you have to keep moving forward."
The pursuit of mathematical knowledge is a never-ending adventure, filled with challenges, surprises, and the satisfaction of solving the unsolvable.
When you can live forever, what do you live for?
The artist must create his own mythology.