Priusquam autem ad creationem, hoc est ad finem omnis disputationis, veniamus: tentanda omnia existimo.

However, before we come to [special] creation, which puts an end to all discussion: I think we should try everything else.

We can allow satellites, planets, suns, universe, nay whole systems of universe, to be governed by laws, but the smallest insect, we wish to be created at once by special act.

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

We ought not to ask why the human mind troubles to fathom the secrets of the universe. The diversity of the phenomena of nature is so great, and the treasures hidden in the skies so rich, precisely in order that the human mind shall never be lacking in fresh nourishment.

Discover the force of the skies O Men: once recognised it can be put to use.

I used to measure the skies, now I measure the shadows of Earth.
Although my mind was sky-bound, the shadow of my body lies here.

[Epitaph he composed for himself a few months before he died]