计算机并不重要，它只能给你答案。

"Books are the quietest and most constant of friends; they are the most accessible and wisest of counselors, and the most patient of teachers."

We must build a world in which there shall be no economic domination, no exploitation, no unemployment, and no war.

Every time you fail, you come one step closer to success.

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