When the moon is ninety degrees away from the sun it sees but half the earth illuminated (the western half). For the other (the eastern half) is enveloped in night. Hence the moon itself is illuminated less brightly from the earth, and as a result its secondary light appears fainter to us.

The greatest wisdom is to get to know oneself.

Holy Scripture could never lie or err...its decrees are of absolute and inviolable truth.

They seemed to forget that the increase of known truths stimulates the investigation, establishment and growth of the arts; not their dimination or destruction.

If you could see the earth illuminated when you were in a place as dark as night, it would look to you more splendid than the moon.

My dear Kepler, what would you say of the learned here, who, replete with the pertinacity of the asp, have steadfastly refused to cast a glance through the telescope? What shall we make of this? Shall we laugh, or shall we cry?

I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.