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

The Creator, the fountain of all wisdom, the approver of perpetual order, the eternal and superessential spring of geometry and harmonics.

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

The Earth is round, and is inhabited on all sides, is insignificantly small, and is borne through the stars.

In theology we must consider the predominance of authority; in philosophy the predominance of reason.

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.

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.