...for a long time I wanted to become a theologian... now, however, behold how through my efforts God is being debated in astronomy.

I believe the geometric proportion served the creator as an idea when He introduced the continuous generation of similar objects from similar objects.

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.

If my false figures came near to the facts, this happened merely by chance ... These comments are not worth printing. Yet it gives me pleasure to remember how many detours I had to make, along how many walls I had to grope in the darkness of my ignorance until I found the door which lets in the light of the truth ... In such manner did I dream of the truth.

The heavenly motions... are nothing but a continuous song for several voices, perceived not by the ear but by the intellect, a figured music which sets landmarks in the immeasurable flow of time.

If God himself has waited six thousand years for someone to contemplate his works, my book can wait for a hundred.

When ships to sail the void between the stars have been built, there will step forth men to sail these ships.