Anything one man can imagine, other men can make real.

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Science, my lad, is made up of mistakes, but they are mistakes which it is useful to make, because they lead little by little to the truth.

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All that is impossible remains to be accomplished.

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I believe that water will one day be employed as fuel, that hydrogen and oxygen which constitute it, used singly or together, will furnish an inexhaustible source of heat and light, of an intensity of which coal is not capable.

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What darkness to you is light to me.

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I believe cats to be spirits come to earth. A cat, I am sure, could walk on a cloud without coming through.

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Anything capable of being imagined will one day be made reality.

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Poets are like proverbs: you can always find one to contradict another.

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Nature's creative power is far beyond man's instinct of destruction.

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Man is never perfect nor contented.

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