Galileo Galilei (1564-1642) was a famous Italian physicist, astronomer and philosopher, universally known as "Father of Science". Many modern inventions and discoveries were possible due to the theories and hypotheses that he proposed during the 17th century. His contributions include the telescopic confirmation of the Phases of Venus, the Jupiter Satellites (called the Galilean Moon), the Military Compass and the Global Satellite Navigation System.
His written works include great works such as' Dialogues about the world's systems', 'The Sidereal Gazette. Conversation with the sidereal messenger ',' Speech and mathematical demonstration, about two new sciences' and 'Letter to Mrs. Cristina de Lorena, Grand Duchess of Tuscany'. His writings express his thoughts on various topics such as philosophy, astronomy, God, religion and scripture, and have become very popular, as well as their appointments.
In honor of this great philosopher, a low-cost, high-quality telescope called Galileoscope was launched in 2009, allowing many people to see the same things he saw himself in his time.
Today we bring you these wonderful philosophical and inspiring quotes from Galileo Galilei about evolution, wisdom, faith, art, teaching, reason, truth, nature, mathematics, astronomy, beauty and religion.
Famous quotes from Galileo Galilei
The best science is not learned in books; the greatest and best teacher is Nature.
To speak obscurely can be done by anyone, but clearly, very few.
Philosophy is written in this great book that is continuously open to us: the universe; but you can't understand if you don't learn the language and the characters with which it is written.
I have never met a man so ignorant that I could not learn anything from him.
All truths are easy to understand once they are discovered; The question is to discover them.
Doubt is the mother of the invention.
You cannot teach a man anything, but you can help him discover it for himself.
In science, the authority of thousands of opinions is not worth as much as a small spark of reason in an individual man.
Who would dare to say that we know everything there is to know?
Mathematics is the key and the door of science.
There are those who reason well, but they are far outnumbered by those who reason badly.
Two truths cannot contradict each other.
The greatest wisdom is to know oneself.
I cannot believe that God has endowed us with senses, word and intellect, and has wanted, despising the possible use of these, to give us by other means the information that by those we can acquire.
The sun, with all those planets that revolve around it and depend on it, can still ripen a bunch of grapes as if it had nothing else to do in the universe.
To be human, we must always be ready to make that wise, ingenious and modest statement "I don't know."
In my studies of astronomy and philosophy I hold this opinion about the universe, that the Sun remains fixed in the center of the circle of celestial bodies, without changing its place; and the Earth, turning on itself, moves around the sun.
The prohibition of science would be contrary to the Bible, which in hundreds of places teaches us how the greatness and glory of God shine beautifully in all his works, and should be read especially in the open book of heaven.
Measure what is measurable, and make what is not measurable.
Nothing contrary to nature happens, except the impossible, and that never happens.
Regarding the issues that require reflection: the less they know and understand them, the more positively people try to discuss them.
You can force me to say whatever you want; You can vilify me by saying what I say. However, it moves.
Science proceeds more by what it has learned to ignore than by what it takes into account.
Wine is sunlight, united by water.
By denying scientific principles, one can maintain any paradox.
It is surely harmful for souls to make it heresy to believe what is proven.
If you could see the illuminated earth when you were in a place as dark as night, it would seem more splendid than the moon.
In the long run, my observations have convinced me that some men, reasoning absurdly, first establish in their minds a conclusion that, either by being their own or by having received it from someone who has all their confidence, impresses them so deeply that one finds it impossible to get it out of the head.
To understand the Universe, you must understand the language in which it is written, the language of Mathematics.
Where the senses fail us, reason must intervene.
Surely, God could have caused the birds to fly with their bones made of solid gold, with their veins full of silver, with their flesh heavier than lead and with their extremely small wings. He didn't do it, and that should prove something. It is only to protect your ignorance that you put the Lord at every moment in the shelter of a miracle.
The Bible is a book about going to heaven. It is not a book about how the skies are going.
I am inclined to think that the authority of the Holy Scriptures is intended to convince men of those truths that are necessary for their salvation, which, being well above the understanding of man, cannot be credible by any learning or by any means other than revelation by the Holy Spirit.
I think that in the discussion of natural problems we must begin not with the Scriptures, but with experiments and demonstrations.
The Milky Way is nothing more than a mass of innumerable stars arranged in groups.
Philosophy itself cannot help but benefit from our disputes, since if our conceptions prove to be true, new achievements will be achieved; If it is false, its refutation will further confirm the original doctrines.
To send astronomy professors to refute their own observations is to order them not to see what they see and not to understand what they understand.
Look now at the power of truth; the same experiment that at first sight seemed to show one thing, when examined more carefully, assures us otherwise.
But remember that we are dealing with infinite and indivisible, which transcend our finite understanding, the first by its magnitude, the last by its smallness.
Demonstrating a greater affection for their own opinions than for the truth, they sought to deny and refute the new things that, if they had worried about seeking each other, their own senses would have shown them.
I, Galileo, son of the late Vicenzo Galilei, swear that I never said that prime numbers are useless. What I said was that you cannot count the lunar craters by counting 2, 3, 5, 7.
Those who depend on manifest observations will philosophize better than those who persist in disgusting opinions for the senses.
Nature ... does not act through many things when it can do so through a few.
Take note, theologians, that in your desire to make matters of faith from propositions related to the solidity of the earth and the sun, you run the risk of having to condemn as heretics those who declare that the earth stops and the sun not to change position: at the moment when it can be demonstrated physically or logically that the earth moves and the sun stops.
The earth, in a fair and grateful exchange, returns to the moon an illumination similar to that which it receives from it during almost all the darkest darkness of the night.
The hypothesis is beautiful; Its only flaw is that it is not proven or demonstrable. Who does not see that this is a purely arbitrary fiction that puts nothing as existing and proposes nothing but a simple contradiction?
Philosophy is written in the great book that is ever presented before our eyes, I mean the universe, but we cannot understand it if we do not first learn the language and capture the symbols in which it is written.
In matters of science, the authority of a thousand is not worth the humble reasoning of a single individual.
Being infinitely astonished, I also thank God, who has been pleased to make me the first observer of wonderful things, not revealed to times past.
Nature ... It is inexorable and immutable; she never transgresses the laws that are imposed on her, nor does she care if her reasons and methods of operation are understandable to men.
It seems to me that it was well said for its excellence that Sacred Scripture cannot err, and that the decrees it contains are absolutely true and inviolable. But he should have added instead that, although the Scriptures cannot err, their exhibitors and interpreters are likely to err in many ways; and a particular error would be the most serious and the most frequent, if we always stopped at the literal meaning of the words.
The number of people who can reason well is much less than those who can reason badly. If the reasoning were like dragging rocks, several reasoners could be better than one. But the reasoning is not like dragging rocks, it's like running, where a galloping Berber steed easily surpasses a hundred horses that drag cars.
The deeper I go considering the vanities of popular reasoning, the lighter and more silly I find them. What greater stupidity can be imagined than calling jewelry, silver and gold "precious" and land and soil "base"?
As far as philosophers are concerned, if they are true philosophers, that is, lovers of truth, they should not be irritated because the earth moves. Rather, if they realize that they have had a false belief, they should thank those who have shown them the truth; and if their opinion remains firm that the earth does not move, they will have reason to boast of getting angry.
It is a beautiful and lovely sight to see the body of the Moon.
The laws of nature are written in the language of mathematics ... the symbols are triangles, circles and other geometric figures, without whose help it is impossible to understand a single word.
It bothers me when they restrict science by the authority of the Scriptures and yet they do not consider themselves obliged to respond to reason and experiment.
Nature is relentless and immutable, and it is indifferent whether its hidden reasons and actions are understandable to man or not.
Among the great men who have philosophized about the action of the tides, the one that surprised me the most was Kepler. He was a person of independent genius, but he was interested in the action of the moon on water and other hidden phenomena.
The vain presumption of understanding everything cannot have any other basis than ever having understood anything. For anyone who has ever once experienced the perfect understanding of one thing, and has really proven how knowledge is achieved, he would recognize that from the infinity of other truths he understands nothing.
Some, in addition to loyalty to their original error, do not know what fanciful interest in remaining hostile, not so much towards the things in question, as towards their discoverer.
I have been judged vehemently suspected of heresy, that is, of having held and believed that the sun is at the center of the universe and motionless, and that the earth is not at the center of it, and that it moves. However, wishing to remove from the minds of your Eminences and all faithful Christians this vehement suspicion reasonably conceived against me, I renounce with a sincere heart and sincere faith, I curse and detest such errors and heresies, and in general each and every One of the mistakes of the sacred church.
If there was such a shortage of soil as jewels or precious metals, there would not be a prince who did not want to pass a bushel of diamonds and rubies and a cart loaded with gold just to have enough land to plant a jasmine in a small pot, or to sow an orange seed and watch it sprout, grow and produce its beautiful leaves, fragrant flowers and fine fruit.
And believe me, if I started my studies again, I should follow Plato's advice and start with the mathematical sciences, which proceed with great caution and I will not admit anything established until it has been rigorously demonstrated.
Over time, you can discover everything that can be discovered, and yet, your progress will only be progressing away from humanity. The distance between them can be such a great day that your cry of joy for a new discovery could be answered by a universal cry of horror.
It is very pious and prudent to affirm that the Holy Bible can never tell lies, provided its true meaning is understood. But I think nobody will deny that it is often very abstract, and can say things that are very different for one or the other.
The surface of the Moon is not smooth, uniform and, precisely, spherical, as many philosophers believe it is, it is uneven, rough and full of cavities and prominences, not being different from the face of the Earth, relieved by mountain chains and deep valleys.
The doctrine that the Earth is the center of the universe and is motionless, is absurd, and both philosophically and theologically false, and at least an error of faith.
The divine intellect, in fact, knows infinitely more propositions than we can know. But with respect to those few who understand the human intellect, I believe that their knowledge is equal to the Divine in objective certainty.
Difficulties in the study of infinity arise because we try, with our finite minds, to discuss the infinite, assigning those properties that we give to the finite and limited; but this ... is incorrect, because we cannot speak of infinite quantities as being greater or less than or equal to another.
I don't know what to say in such a surprising case, so unexpected and so novel.
It reveals to me the causes of many natural phenomena that are totally incomprehensible in light of the generally accepted hypotheses. To refute the latter, I gathered a lot of evidence, but I don't publish them ... I would dare to publish my speculation if there were people like you.
I would ask the wise and wise fathers of the church to consider with all diligence the difference between matters of mere opinion and questions of demonstration.
Certainly, I am interested in a court in which, for having used my reason, I was considered little less than a heretic. Who knows, but men will reduce me from the profession of philosopher to that of historian of the Inquisition!
Some, simply to contradict what he had said, did not dare to cast doubt on the things they had seen with their own eyes over and over again.
The facts that at first glance seem unlikely, even with little explanation, drop the layer that has hidden them and stand out in simple and naked beauty.
To excite in us the tastes, smells and sounds, I believe that nothing is required in the external bodies, except for the forms, the numbers and the slow or fast movements… if the ears, the languages and the noses were eliminated, the shapes, numbers and movements, but not smells, flavors or sounds.
I do not think it is necessary to believe that the same God who has given us our senses, reason and intelligence wanted us to abandon their use, giving us by some other means the information we could obtain through them.
And who can doubt that it will lead to the worst disorders when the minds created by God are forced to subserviently submit to an external will? When are we told to deny our senses and subject them to the whim of others? When people who lack any competence become judges over experts and are given authority to treat them as they please? These are the novelties that can cause the ruin of the community and the subversion of the state.
God is known by nature in his works, and by the doctrine in his revealed word.
Long experience has taught me this about the state of humanity with regard to matters that require reflection: the less people know and understand about them, the more positively they try to discuss them, while, on the other hand, knowing and understanding a a multitude of things make men cautious when judging anything new.
Oh, my dear Kepler, how I wish we could have a cordial laugh together. Here, in Padua, is the main professor of philosophy, whom I have repeatedly and urgently asked to look at the moon and the planets through my telescope, which he refuses to do. Because you are not here? What cries of laughter we should have before this glorious madness! and listen to the professor of philosophy of Pisa work before the grand duke with logical arguments, as with magic spells, to enchant new planets from heaven.