Galileo Galilei Quotes

Italian - Scientist February 15, 1564 - January 8, 1642

We cannot teach people anything; we can only help them discover it within themselves.

Galileo Galilei

People Brainy Help Only Anything

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

Galileo Galilei

Truth Understand Easy Discover

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

Galileo Galilei

Education Mathematics Beginning Start

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

Galileo Galilei

Religion Bible Way Heaven Go

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.

Galileo Galilei

God Believe Religion Feel

Measure what is measurable, and make measurable what is not so.

Galileo Galilei

Measure Make Measurable

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

Galileo Galilei

Learning Man Never Learn Something

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

Galileo Galilei

Science Humble Questions Worth

Philosophy is written in this grand book, the universe, which stands continually open to our gaze. But the book cannot be understood unless one first learns to comprehend the language and read the letters in which it is composed.

Galileo Galilei

Book Universe Language Philosophy

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.

Galileo Galilei

Nature Sun Universe Nothing

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

Galileo Galilei

Believe Make Souls Heresy Surely

And yet it moves.

Galileo Galilei

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

Galileo Galilei

Numbers Say Must Many

Who would set a limit to the mind of man? Who would dare assert that we know all there is to be known?

Galileo Galilei

Man Mind Know Limit

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

Galileo Galilei

Stars Together Way Nothing

I give infinite thanks to God, who has been pleased to make me the first observer of marvelous things.

Galileo Galilei

God Me Things Infinite

The nature of the human mind is such that unless it is stimulated by images of things acting upon it from without, all remembrance of them passes easily away.

Galileo Galilei

Nature Mind Acting Things

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

Galileo Galilei

Nature Man Hidden Actions

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.

Galileo Galilei

Science Me Reason Authority

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.

Galileo Galilei

Beauty Simple Facts Naked

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

Galileo Galilei

Think Problems Discussion Natural

Where the senses fail us, reason must step in.

Galileo Galilei

Step Reason Us Where Fail

By denying scientific principles, one may maintain any paradox.

Galileo Galilei

Science May Principles Paradox

I notice that young men go to the universities in order to become doctors or philosophers or anything, so long as it is a title, and that many go in for those professions who are utterly unfit for them, while others who would be very competent are prevented by business or their daily cares, which keep them away from letters.

Galileo Galilei

Business Men Daily Long

He who looks the higher is the more highly distinguished, and turning over the great book of nature (which is the proper object of philosophy) is the way to elevate one's gaze.

Galileo Galilei

Nature Great Book Way

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