Tragic art, as it developed in the theaters of ancient Greece, in the fifth century B.C., was essentially an art form devoted to tracing how people fail, and also according them a level of sympathy, which ordinary life would not necessarily accord them. A few years ago, I was thinking about this, and I went to "The Sunday Sport," a tabloid newspaper I don't recommend you start reading if you're not familiar with it already.

成长型思维是相信你的能力可以通过奉献和努力得到发展。

"Randomized experiments are the gold standard for causal inference, but they are not always feasible."

企业的成功不是靠运气，而是靠努力。