We live in the most probable of all possible worlds.

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Nothing cannot exist forever.

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Galileo, perhaps more than any other single person, was responsible for the birth of modern science.

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Look up at the stars, not down at your feet.

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Aristarchus suspected that this was the case and believed that the stars we see in the night sky are actually nothing more than distant suns.

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I would see the end of physics as we know it, but now I think the wonder of discovery will continue long after I am gone. We are close to some of these answers, but we are not there yet.

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The wise never marry, and when they marry they become otherwise.

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Estoy convencido de que los humanos necesitamos dejar la Tierra para evitar correr el riesgo de ser aniquilados.

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I've noticed that even people who believe in fate look both ways before crossing the street.

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We should seek the greatest value of our action.

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