So, Fabricius, I already have this: that the most true path of the planet [Mars] is an ellipse, which Dürer also calls an oval, or certainly so close to an ellipse that the difference is insensible.

Nature uses as little as possible of anything.

Geometry is one and eternal shining in the mind of God

So long as the mother, Ignorance, lives, it is not safe for Science the offspring, to divulge the hidden causes of things.

We do not ask for what useful purpose the birds do sing, for song is their pleasure since they were created for singing. Similarly, we ought not to ask why the human mind troubles to fathom the secrets of the heavens.

I believe only and alone in the service of Jesus Christ. In him is all refuge and solace.

The roads by which men arrive at their insights into celestial matters seem to me almost as worthy of wonder as those matters in themselves.