Two truths cannot contradict one another.

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

It is a beautiful and delightful sight to behold the body of the Moon.

The greatest wisdom is to get to know oneself.

But, because my private lectures and domestic pupils are a great hinderance and intteruption of my studies, I wish to live entirely exempt from the former, and in great measure from the latter. ... in short, I should wish to gain my bread from my writings.

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

The number of people that can reason well is much smaller than those that can reason badly. If reasoning were like hauling rocks, then several reasoners might be better than one. But reasoning isn't like hauling rocks, it's like, it's like racing, where a single, galloping Barbary steed easily outruns a hundred wagon-pulling horses.