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The greatest discovery of my generation is that a human being can alter his life by altering his attitudes.

生命太短暫，不要帶著遺憾醒來。

Do you not see how necessary a world of pains and troubles is to school an intelligence and make it a soul?

Positive emotions are like nutrients for the mind, helping us grow and flourish.

科學(xué)應(yīng)該為人類服務(wù)，而不是反過來。