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Immature poets imitate; mature poets steal.

通往善的道路就是通往真理的道路。

Sustainability isn't a choice—it's a responsibility we owe to the next generation.

這句話其實是莎士比亞借哈姆雷特之口說的，但是霍金非常喜歡，曾在自己著作中多次引用，所以很多人誤以為本句話是霍金說的。

The most glorious moments in your life are not the so-called days of success, but rather those days when out of dejection and despair you feel rise in you a challenge to life, and the promise of future accomplishment.