Quotes by Galileo Galilei

• Do not be afraid to walk alone, for even the boldest minds are often misunderstood by the crowd.
• Where the senses fail us, reason must step in.
• The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.
• It is surely harmful to souls to make it a heresy to believe what is proved.
• 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.
• We must say that there are as many squares as there are numbers.
• We cannot teach people anything; we can only help them discover it within themselves.
• 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.
• 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.
• In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.
• If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.
• I've loved the stars too fondly to be fearful of the night.
• I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.
• 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.
• By denying scientific principles, one may maintain any paradox.
• All truths are easy to understand once they are discovered; the point is to discover them.
• Measure what is measurable, and make measurable what is not so.
• Wine is sunlight, held together by water.