Where the senses fail us, reason must step in.

I am certainly interested in a tribunal in which, for having used my reason, I was deemed little less than a heretic. Who knows but men will reduce me from the profession of a philosopher to that of historian of the Inquisition!

I am inclined to think that the authority of Holy Scripture is intended to convince men of those truths which are necessary for their salvation, which, being far above man's understanding, can not be made credible by any learning, or any other means than revelation by the Holy Spirit.

Holy Writ was intended to teach men how to go to Heaven not how the heavens go.

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.

To understand the Universe, you must understand the language in which it's written, the language of Mathematics.

To command their professors of astronomy to refute their own observations is to command them not to see what they do see and not to understand what they do understand.