Galileo galilei

By denying scientific principles, one may maintain any paradox.

It is surely harmful to souls to make it a heresy to believe what is proved.

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

Where the senses fail us, reason must step in.

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

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

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.

We must say that there are as many squares as there are numbers.

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 Milky Way is nothing else but a mass of innumerable stars planted together in clusters.