My goal is to show that the heavenly machine is not a kind of divine living being but similar to a clockwork insofar as all the manifold motions are taken care of by one single absolutely simple magnetic bodily force, as in a clockwork all motion is taken care of by a simple weight.
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"I am a Christian. I believe in the Trinity."
"The world is a book, and those who do not travel read only one page."
"Mathematics is the alphabet with which God has written the universe."
"The diversity of the phenomena of nature is so great, and the treasures hidden in the heavens so rich, precisely in order that the human mind shall never be lacking in fresh nourishment."
"I am a German, and I love my country."
Letter to Herwart von Hohenberg, advocating a mechanistic view of the cosmos.
Date: February 10, 1605
ReligiousFound in 1 providers: gemini
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Kepler argues the universe isn't alive or guided by a soul, but works like a machine. Just as a clock runs from one simple weight pulling its gears, the planets move because of one basic physical force. He's replacing the ancient idea of heavenly spirits with a mechanical explanation where predictable natural forces, not divine intelligence, drive celestial motion.
Kepler spent years calculating Mars's orbit and formulating his three laws of planetary motion. Though deeply religious, he insisted physical causes governed the heavens, proposing magnetism as the force moving planets around the sun. This clockwork metaphor captures his lifelong project: replacing Aristotle's animate cosmos with mathematical, mechanical laws, bridging medieval mysticism and Newton's later gravitational physics.
In early 1600s Europe, the Scientific Revolution was dismantling the ancient view of a living, ensouled cosmos. Copernicus had moved Earth from center stage, Galileo's telescope revealed imperfect heavens, and William Gilbert had just published work on magnetism. The Church still enforced Aristotelian cosmology, making mechanical explanations controversial. Kepler wrote this amid the Thirty Years' War, when reimagining the universe as machinery rather than divine organism was genuinely revolutionary.
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