"All truths are easy to understand once they are discovered; the point is to discover them."
"The earth, in fair and grateful exchange, pays back to the moon an illumination similar to that which it receives from her throughout nearly all the darkest gloom of the night."
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Source: Letter to Johannes Kepler (1610), as quoted in The Crime of Galileo by Giorgio De Santillana, 1955.
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"I have never met a man so ignorant that I couldn't learn something from him."
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