So long as the mother, Ignorance, lives, it is not safe for Science the offspring, to divulge the hidden causes of things.
Johannes KeplerSo, Fabricius, I already have this: that the most true path of the planet [Mars] is an ellipse, which Dรผrer also calls an oval, or certainly so close to an ellipse that the difference is insensible.
Johannes KeplerGeometry 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.
Johannes Kepler