随机实验是因果推理的黄金标准，但它们并不总是可行的。
"Randomized experiments are the gold standard for causal inference, but they are not always feasible."
Man's search for meaning is the primary motivation in his life.
The key to success is persistence, persistence, and more persistence.
To understand is to forgive, even when understanding is hardest to come by.
"The writer's job is to get the main character up a tree, and then once they are up there, throw rocks at them."
译文：物质方面的享受，我们要节俭几分才最好，为人处世能退让一步才算高明。赏析：基本的物质享受应该追求，但不能纵情享乐，醉生梦死。待人接物，不必事事都要争个高低，懂得收敛锋芒，才是智者。
Technology is just a tool, people are the real asset.