Top 90 Galileo Galilei Quotes (2025 Update)

1. “Mathematics is the language with which God has written the universe.”

— Galileo Galilei

Featured in: Learning Quotes, Famous Quotes, Science Quotes

2. “The book of nature is written in the language of mathematics.”

— Galileo Galilei

Featured in: Science Quotes, Nature Quotes, Math Quotes, Principles And Laws

3. “Mathematics is the key and door to the sciences.”

— Galileo Galilei

Featured in: Science Quotes, Knowledge Quotes

4. “Passion is the genesis of genius.”

— Galileo Galilei

5. “Eppur si muove.”

— Galileo Galilei

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

— Galileo Galilei

Featured in: Knowledge Quotes

7. “To understand the Universe, you must understand the language in which it’s written, the language of Mathematics.”

— Galileo Galilei

8. “I’ve loved the stars too fondly to be fearful of the night.”

— Galileo Galilei

Featured in: Quotes About Night

9. “Measure what is measurable, and make measurable what is not so.”

— Galileo Galilei

10. “I have never met a man so ignorant that I couldn’t learn something from him.”

— Galileo Galilei

Featured in: Learning Quotes

11. “Nature’s great book is written in mathematics.”

— Galileo Galilei

Featured in: Science Quotes

12. “I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forego their use.”

— Galileo Galilei

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

— Galileo Galilei

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

— Galileo Galilei

Featured in: Science Quotes, Truth Quotes

15. “You cannot teach a person something he does not already know, you can only bring what he does know to his awareness.”

— Galileo Galilei

16. “The Universe is a grand book which cannot be read until one first learns to comprehend the language and becomes familiar with the characters in which it is composed. It is written in the language of mathematics.”

— Galileo Galilei

Featured in: Space Quotes

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

— Galileo Galilei

18. “Two truths cannot contradict one another.”

— Galileo Galilei

19. “Where the senses fail us, reason must step in.”

— Galileo Galilei

20. “Knowing thyself, that is the greatest wisdom.”

— Galileo Galilei

21. “God is known by nature in his works, and by doctrine in his revealed word.”

— Galileo Galilei

22. “The greatest wisdom is to get to know oneself.”

— Galileo Galilei

23. “Nonetheless, it moves.”

— Galileo Galilei

24. “You can’t teach anybody anything, only make them realize the answers are already inside them.”

— Galileo Galilei

25. “Wine is sunlight, held together by water.”

— Galileo Galilei

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

— Galileo Galilei

27. “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

28. “By denying scientific principles, one may maintain any paradox.”

— Galileo Galilei

29. “What has philosophy got to do with measuring anything? It’s the mathematicians you have to trust, and they measure the skies like we measure a field.”

— Galileo Galilei

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

— Galileo Galilei

31. “You may force me to say what you wish; you may revile me for saying what I do. But it moves.”

— Galileo Galilei

32. “Man kann einen Menschen nichts lehren. Man kann ihm nur helfen, es in sich selbst zu finden!”

— Galileo Galilei

33. “The prohibition of science would be contrary to the Bible, which in hundreds of places teaches us how the greatness and the glory of God shine forth marvelously in all His works, and is to be read above all in the open book of the heavens.”

— Galileo Galilei

34. “Philosophy is written in that great book which ever lies before our eyes – I mean the universe – but we cannot understand it if we do not first learn the language and grasp the symbols, in which it is written.”

— Galileo Galilei

35. “Nothing occurs contrary to nature except the impossible, and that never occurs.”

— Galileo Galilei

36. “See now the power of truth.”

— Galileo Galilei

37. “It is a beautiful and delightful sight to behold the body of the Moon.”

— Galileo Galilei

38. “There are those who reason well, but they are greatly outnumbered by those who reason badly.”

— Galileo Galilei

39. “Names and attributes must be accommodated to the essence of things, and not the essence to the names, since things come first and names afterwards.”

— Galileo Galilei

Featured in: Firsts Quotes

40. “Science proceeds more by what it has learned to ignore than what it takes into account.”

— Galileo Galilei

41. “Being infinitely amazed, so do I give thanks to God, Who has been pleased to make me the first observer of marvelous things, unrevealed to bygone ages.”

— Galileo Galilei

Featured in: Firsts Quotes

42. “If you could see the earth illuminated when you were in a place as dark as night, it would look to you more splendid than the moon.”

— Galileo Galilei

43. “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

44. “Who would dare assert that we know all there is to be known?”

— Galileo Galilei

45. “In my studies of astronomy and philosophy I hold this opinion about the universe, that the Sun remains fixed in the centre of the circle of heavenly bodies, without changing its place; and the Earth, turning upon itself, moves round the Sun.”

— Galileo Galilei

46. “See now the power of truth; the same experiment which at first glance seemed to show one thing, when more carefully examined, assures us of the contrary.”

— Galileo Galilei

Featured in: Firsts Quotes

47. “I, Galileo, son of the late Vicenzo Galilei, swear that I never said that the prime numbers are useless. What I said was that you cannot count lunar craters by counting 2, 3, 5, 7...”

— Galileo Galilei

48. “The deeper I go in considering the vanities of popular reasoning, the lighter and more foolish I find them. What greater stupidity can be imagined than that of calling jewels, silver, and gold “precious,” and earth and soil “base”?”

— Galileo Galilei

49. “Scripture is a book about going to Heaven. It’s not a book about how the heavens go.”

— Galileo Galilei

50. “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