"All truths are easy to understand once they are discovered; the point is to discover them."
"Alas! Your dear friend and servant Galileo has been for the last month hopelessly blind; so that this heaven, this earth, this universe, which I by my marvelous discoveries and clear demonstrations had enlarged a hundred thousand times beyond the belief of the wise men of bygone ages, henceforward for me is shrunk into such a small space as is filled by my own bodily sensations."
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Source: Letter to Élie Diodati (p. 279), January 2, 1638.
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