Johannes Kepler

The most true path of the planet Mars is an ellipse, which Drer also calls an oval, or certainly so close to an ellipse that the difference is insensible.

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.

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.

Nature uses as little as possible of anything.

Planets move in ellipses with the Sun at one focus.

The squares of the periodic times are to each other as the cubes of the mean distances.

Geometry is the archetype of the beauty of the world.

The radius vector describes equal areas in equal times.

I demonstrate by means of philosophy that the earth is round, and is inhabited on all sides; that it is insignificantly small, and is borne through the stars.

Where there is matter there is geometry.

Geometry is one and eternal shining in the mind of God. That share in it accorded to humans is one of the reasons that humanity is the image of God.

Truth is the daughter of time, and I feel no shame in being her midwife.