Kepler Johannes. 1571-1630. German astronomer and mathematician.
Geometry has two great treasures: one is the theorem of Pythagoras; the other, the division of a line into extreme and mean ratio. The first we may compare to a measure of gold; the second we may name a precious jewel.
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Where there is matter, there is geometry.
Geometry is one and eternal shining in the mind of God. That share in it accorded to men is one of the reasons that Man is the image of God.
Conversation with the Sidereal Messenger (an open letter to Galileo Galilei)
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