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Success is measured not just in profits, but in positive impact.

Happiness is beneficial for the body, but it is grief that develops the powers of the mind.

唯一受過教育的人是學會了如何學習和改變的人。

We are all cut from the same genetic cloth, and that cloth was woven in Africa.

記憶是一件棘手的事情；它既可以是祝福也可以是詛咒。

"Every saint has a past, and every sinner has a future."

Natural experiments can provide valuable insights into economic questions.