技术可以放大优秀教学的效果，但无法替代糟糕的教学。

"The beauty of discovery lies in the unexpected connections we find."

The desire for recognition, the thymotic part of the soul, is the most politically dangerous part of human nature.

"Causal inference requires careful thought about the assumptions underlying your analysis."

We're told, from many sources, that any onecan achieve anything. We've done away with the caste system, we are now in a system where anyone can rise to any position they please. And it's a beautiful idea. Along with that is a kind of spirit of equality; we're all basically equal. There are no strictly defined hierarchies. There is one really big problem with this, and that problem is envy.