"I much prefer the sharpest criticism of a single intelligent man to the thoughtless approval of the masses."
"As soon as somebody demonstrates the art of flying, settlers from our species of man will not be lacking on the moon and Jupiter... Given ships or sails adapted to the breezes of heaven, there will be those who will not shrink from even that vast expanse."
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Source: Johannes Kepler (1965). “Kepler's Conversation with Galileo's Sidereal messenger”
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