True progress happens when we balance economic growth with environmental stewardship.

去做高尚的事情，不要整天只是做梦。

Economics is ultimately about improving human welfare.

I'm like a dog, I don't speak but I understand.

The writer must believe that what he is doing is the most important thing in the world. And he must hold to this illusion even when he knows it is not true.

保持谦逊，保持渴望。