Galileo Galilei
We cannot teach people anything; we can only help them discover it within themselves.Collection: Brainy
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.Collection: Science
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.Collection: God
By denying scientific principles, one may maintain any paradox.Collection: Science
The Bible shows the way to go to heaven, not the way the heavens go.Collection: Religion
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.Collection: Nature
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.Collection: Beauty
I give infinite thanks to God, who has been pleased to make me the first observer of marvelous things.Collection: God
All truths are easy to understand once they are discovered; the point is to discover them.Collection: Truth
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.Collection: Nature
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.Collection: Business
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.Collection: Science
If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.Collection: Education
I have never met a man so ignorant that I couldn't learn something from him.Collection: Learning
Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not.Collection: Nature
Measure what is measurable, and make measurable what is not so.
Where the senses fail us, reason must step in.
And yet it moves.
The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.
Who would set a limit to the mind of man? Who would dare assert that we know all there is to be known?
It is surely harmful to souls to make it a heresy to believe what is proved.
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.
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.
We must say that there are as many squares as there are numbers.
I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.
You can't teach anybody anything, only make them realize the answers are already inside them.Collection: Happiness
The laws of nature are written by the hand of God in the language of mathematics.Collection: Hands
In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.Collection: Men
Knowing thyself, that is the greatest wisdom.Collection: Knowing
I do not feel obliged to believe that the same God who has endowed us with senses, reason, and intellect has intended us to forego their use.Collection: Spiritual
Two truths cannot contradict one another.Collection: Truth
To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement 'I do not know'.Collection: Wise
To understand the Universe, you must understand the language in which it's written, the language of Mathematics.Collection: Language
Measure what can be measured, and make measureable what cannot be measured.Collection: Physics
There are those who reason well, but they are greatly outnumbered by those who reason badly.Collection: Reason
Nonetheless, it moves.Collection: Moving
The greatest wisdom is to get to know oneself.Collection: Greatest Wisdom
You cannot teach a person something he does not already know, you can only bring what he does know to his awareness.Collection: Inspirational
Mathematics is the key and door to the sciences.Collection: Knowledge
And who can doubt that it will lead to the worst disorders when minds created free by God are compelled to submit slavishly to an outside will? When we are told to deny our senses and subject them to the whim of others? When people devoid of whatsoever competence are made judges over experts and are granted authority to treat them as they please? These are the novelties which are apt to bring about the ruin of commonwealths and the subversion of the state.Collection: Math
Who would dare assert that we know all there is to be known?Collection: Dare
God is known by nature in his works, and by doctrine in his revealed word.Collection: Doctrine
You may force me to say what you wish; you may revile me for saying what I do. But it moves.Collection: Moving
Nothing can be taught to a man, only it's possibly to help him to discover it inside.Collection: Men
Alas! Your dear friend and servant Galileo has been for the last month hopelessly blind; so that this heaven, this earth, this universe, which I by my marvelous discoveries and clear demonstrations had enlarged a hundred thousand times beyond the belief of the wise men of bygone ages, henceforward for me is shrunk into such a small space as is filled by my own bodily sensations.Collection: Wise
Their vain presumption of knowing all can take beginning solely from their never having known anything; for if one has but once experienced the perfect knowledge of one thing, and truly tasted what it is to know, he shall perceive that of infinite other conclusions he understands not so much as one.Collection: Knowledge
Spots are on the surface of the solar body where they are produced and also dissolved, some in shorter and others in longer periods. They are carried around the Sun; an important occurrence in itself.Collection: Science
For my part I consider the earth very noble and admirable precisely because of the diverse alterations, changes, generations, etc. that occur in it incessantly.Collection: Generations
They seemed to forget that the increase of known truths stimulates the investigation, establishment and growth of the arts; not their dimination or destruction.Collection: Art
Nothing physical which sense-experience sets before our eyes, or which necessary demonstrations prove to us, ought to be called in question (much less condemned) upon the testimony of biblical passages...Collection: Eye