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世界因你的行動而改變，而非你的觀點。

選自漢·桓寬《鹽鐵論·相刺》。橘柚生長于江南，各地的人吃起來都有甜的感覺，這是因為大家的味覺是相同的；鄭國衛國的音樂，大家都覺得好聽，那是因為大家對聲音效果的感受是相同的。這句話以吃橘柚的感覺與聽音樂的感受為喻，說明是非好壞的標準是客觀存在的，人類社會的價值認同大體是相同的。

I would like to fly in space.Absolutely.That would be cool.I used to just do personally risky things， but now I’ve got kids and responsibilities， so I can’t be my own test pilot.That wouldn’t be a good idea.But I definitely want to fly as soon as it’s a sensible thing to do.

譯文：古人最忌諱，表面對人順從，背地里卻反對。

你跑得越多，他們追得越緊。

The past is never dead. It's not even past.

I'm not a businessman, I'm a business, man.

The most profound discoveries in mathematics often come from the simplest observations.