Galileo Galilei

All truths are easy to understand once they are discovered the point is to discover them.

In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.

It vexes me when they would constrain science by the authority of the Scriptures, and yet do not consider themselves bound to answer reason and experiment.

The Bible shows the way to go to heaven, not the way the heavens go.

Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not.

The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do.

I have never met a man so ignorant that I couldn't learn something from him.

I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.

If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.

Facts which at first seem improbable will, even on scant explanation, drop the cloak which has hidden them and stand forth in naked and simple beauty.