1. “It is surely harmful to souls to make it a heresy to believe what is proved.” – Galileo Galilei
2. “The greatest wisdom is to get to know oneself.” – Galileo Galilei
3. “Thunderbolt and lightning, very very frightening me!” – Galileo Galilei
4. “I do not know what to say in a case so surprising, so unlooked for and so novel.” – Galileo Galilei
5. “To our natural and human reason, I say that these terms ‘large,’ ‘small,’ ‘immense,’ ‘minute,’ etc. are not absolute but relative; the same thing in comparison with various others may be called at one time ‘immense’ and at another ’imperceptible.” – Galileo Galilei
6. “All truths are easy to understand once they are discovered; the point is to discover them.” – Galileo Galilei
7. “To understand the Universe, you must understand the language in which it’s written, the language of Mathematics.” – Galileo Galilei
8. “The book of nature is written in the language of mathematics.” – Galileo Galilei
9. “In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.” – Galileo Galilei
10. “If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.” – Galileo Galilei
11. “Nothing occurs contrary to nature except the impossible, and that never occurs.” – Galileo Galilei
12. “Two truths cannot contradict one another.” – Galileo Galilei
13. “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
14. “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.” – Galileo Galilei
15. “Only the blind need a guide.” – Galileo Galilei
16. “You can’t teach anybody anything, only make them realize the answers are already inside them.” – Galileo Galilei
17. “Enthusiastic people experience life from the inside out.” – Galileo Galilei
18. “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
19. “I’ve loved the stars too fondly to be fearful of the night.” – Galileo Galilei
20. “The fear of infinity is a form of myopia that destroys the possibility of seeing the actual infinite, even though it in its highest form has created and sustains us.” – Galileo Galilei
21. “We must say that there are as many squares as there are numbers.” – Galileo Galilei
22. “Mathematics is the language in which God has written the universe” – Galileo Galilei
23. “In the sciences, the authority of thousands of opinions is not worth as much as one tiny spark of reason in an individual man.” – Galileo Galilei
24. “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
25. “I believe that the intention of Holy Writ was to persuade men of the truths necessary to salvation; such as neither science nor other means could render credible, but only the voice of the Holy Spirit.” – Galileo Galilei
26. “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.” – Galileo Galilei
27. “Showing a greater fondness for their own opinions than for truth, they sought to deny and disprove the new things which, if they had cared to look for themselves, their own senses would have demonstrated to them.” – Galileo Galilei
28. “Knowing thyself, that is the greatest wisdom.” – Galileo Galilei
29. “All inconveniences will be removed as you propound them. Up to this point, only the first and most general reasons have been mentioned which render it not entirely improbable that the daily rotation belongs to the earth rather than to the rest of the universe.” – Galileo Galilei
30. “To apply oneself to great inventions, starting from the smallest beginnings, is no task for ordinary minds; to divine that wonderful arts lie hid behind trivial and childish things is a conception for superhuman talents.” – Galileo Galilei
31. “And, believe me, if I were again beginning my studies, I should follow the advice of Plato and start with mathematics.” – Galileo Galilei
32. “I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.” – Galileo Galilei
33. “Measure what can be measured, and make measurable what cannot be measured.” – Galileo Galilei
34. “Where the senses fail us, reason must step in.” – Galileo Galilei
35. “You cannot teach a person something he does not already know, you can only bring what he does know to his awareness.” – Galileo Galilei
36. “The Bible shows the way to go to heaven, not the way the heavens go.” – Galileo Galilei
37. “I would say here something that was heard from an ecclesiastic of the most eminent degree: The intention of the Holy Spirit is to teach us how one goes to heaven, not how the heavens go.” – Galileo Galilei
38. “Who would dare assert that we know all there is to be known?” – Galileo Galilei
39. “The earth, in fair and grateful exchange, pays back to the moon an illumination similar to that which it receives from her throughout nearly all the darkest gloom of the night.” – Galileo Galilei
40. “I have never met a man so ignorant that I couldn’t learn something from him.” – Galileo Galilei
41. “Vision, I say, is related to light itself. But of this sensation and the things pertaining to it, I pretend to understand but little; and since even a long time would not suffice to explain that trifle, or even to hint at an explanation, I pass over this in silence.” – Galileo Galilei
42. “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
43. “In time you may discover everything that can be discovered, and still your progress will only be progress away from humanity.” – Galileo Galilei
44. “I give infinite thanks to God, who has been pleased to make me the first observer of marvelous things.” – Galileo Galilei
45. “We cannot teach people anything; we can only help them discover it within themselves.” – Galileo Galilei
46. “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
47. “Passion is the genesis of genius.” – Galileo Galilei
48. “About five years ago I was engaged in preparing a catalogue of the ancient books which belong to Christ’s Hospital.” – Galileo Galilei
49. “Surely it is a great thing to increase the numerous host of fixed stars previously visible to the unaided vision, adding countless more which have never before been seen, exposing these plainly to the eye in numbers ten times exceeding the old and familiar stars.” – Galileo Galilei
50. “God is known by nature in his works, and by doctrine in his revealed word.” – Galileo Galilei
51. “I entertain no doubts as to the truth of the transfinites, which I have recognized with God’s help.” – Galileo Galilei
52. “You can’t teach anybody anything, only make them realize the answers are already inside them.” – Galileo Galilei
53. “The sun, with all the planets revolving around it, and depending on it, can still ripen a bunch of grapes as though it had nothing else in the universe to do.” – Galileo Galilei
54. “It is a beautiful and delightful sight to behold the body of the Moon.” – Galileo Galilei
55. “Nothing can be taught to a man, only it’s possibly to help him to discover it inside.” – Galileo Galilei
56. “There are those who reason well, but they are greatly outnumbered by those who reason badly.” – Galileo Galilei
57. “I truly believe the book of philosophy to be that which stands perpetually open before our eyes, though since it is written in characters different from those of our alphabet it cannot be read by everyone.” – Galileo Galilei
58. “You may force me to say what you wish; you may revile me for saying what I do. But it moves.” – Galileo Galilei
59. “Mathematics is the key and door to the sciences.” – Galileo Galilei
60. “Nonetheless, it moves.” – Galileo Galilei
61. “Wine is sunlight, held together by water.” – Galileo Galilei
62. “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
63. “I do not think it is necessary to believe that the same God who has given us our senses, reason, and intelligence wished us to abandon their use, giving us by some other means the information that we could gain through them.” – Galileo Galilei
64. “By denying scientific principles, one may maintain any paradox.” – Galileo Galilei
65. “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
66. “To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement ‘I do not know’.” – Galileo Galilei
67. “Scripture is a book about going to Heaven. It’s not a book about how the heavens go.” – Galileo Galilei
68. “The difficulties in the study of the infinite arise because we attempt, with our finite minds, to discuss the infinite, assigning to it those properties which we give to the finite and limited; but this… is wrong, for we cannot speak of infinite quantities as being the one greater or less than or equal to another.” – Galileo Galilei
69. “Science proceeds more by what it has learned to ignore than what it takes into account.” – Galileo Galilei
70. “They seemed to forget that the increase of known truths stimulates the investigation, establishment, and growth of the arts; not their domination or destruction.” – Galileo Galilei
71. “Nature…does not act by means of many things when it can do so by means of a few.” – Galileo Galilei
72. “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
73. “They who depend upon manifest observations will philosophize better than those who persist in opinions repugnant to the senses.” – Galileo Galilei
74. “They know that it is human nature to take up causes whereby a man may oppress his neighbor, no matter how unjustly.” – Galileo Galilei
75. “The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.” – Galileo Galilei
76. “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
77. “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
78. “Nature’s great book is written in mathematics.” – Galileo Galilei
79. “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
80. “It is necessary for the Bible, in order to be accommodated to the understanding of every man, to speak many things which appear to differ from the absolute truth so far as the bare meaning of the words is concerned.” – Galileo Galilei
81. “It is very pious to say and prudent to affirm that the holy Bible can never speak untruth – whenever its true meaning is understood. But I believe nobody will deny that it is often very abstruse, and may say things which are quite different from wha.” – Galileo Galilei
82. “To know and understand a multitude of things renders men cautious in passing judgment upon anything new.” – Galileo Galilei
83. “When the moon is ninety degrees away from the sun it sees but half the earth illuminated (the western half). For the other (the eastern half) is enveloped in night. Hence the moon itself is illuminated less brightly from the earth, and as a result its secondary light appears fainter to us.” – Galileo Galilei
84. “The laws of nature are written by the hand of God in the language of mathematics.” – Galileo Galilei
85. “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
86. “What ever the course of our lives, we should receive them as the highest gift from the hand of God, in which equally reposed the power to do nothing whatever for us. Indeed, we should accept misfortune not only in thanks but in infinite gratitude to Providence, which by such means detaches us from an excessive love for Earthly things and elevates our minds to the celestial and divine.” – Galileo Galilei
87. “We must say that there are as many squares as there are numbers.” – Galileo Galilei
