I was taught that the way of progress was neither swift nor easy.

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  One never notices what has been done; one can only see what remains to be done.

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  Do not disturb my circles!

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  Remember to look up at the stars and not down at your feet.

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  We choose to go to the Moon in this decade and do the other things, not because they are easy, but because they are hard.

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  Every generation, no doubt, believes itself called to remake the world. Mine knows that it will not remake it.

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  There is no fate that cannot be surmounted by scorn.

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