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Some, merely to contradict what I had said, did not scruple to cast doubt upon things they had seen with their own eyes again and again.

Galileo Galilei

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Galileo Galilei
Age: 77 †
Born: 1564
Born: February 15
Died: 1642
Died: January 8
Astrologer
Astronomer
Engineer
Inventor
Mathematician
Philosopher
Physicist
Polymath
Scientist
University Teacher
Galileo
G. Galilei
Things
Cast
Casts
Merely
Doubt
Seen
Eyes
Scruple
Upon
Scruples
Eye
Contradict

More quotes by Galileo Galilei

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I am inclined to think that the authority of Holy Scripture is intended to convince men of those truths which are necessary for their salvation, which, being far above man's understanding, can not be made credible by any learning, or any other means than revelation by the Holy Spirit.
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Science proceeds more by what it has learned to ignore than what it takes into account.
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You cannot teach a person something he does not already know, you can only bring what he does know to his awareness.
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You may force me to say what you wish you may revile me for saying what I do. But it moves.
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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
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The surface of the Moon is not smooth, uniform, and precisely spherical as a great number of philosophers believe it to be, but is uneven, rough, and full of cavities and prominences, being not unlike the face of the Earth, relieved by chains of mountains and deep valleys.
Galileo Galilei
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To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement 'I do not know'.
Galileo Galilei
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The vain presumption of understanding everything can have no other basis than never having understood anything. For anyone who had ever experienced just once the perfect understanding of one single thing, and had truly tasted how knowledge is accomplished, would recognize that of the infinity of other truths he understands nothing.
Galileo Galilei
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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
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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
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Well, since paradoxes are at hand, let us see how it might be demonstrated that in a finite continuous extension it is not impossible for infinitely many voids to be found.
Galileo Galilei
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The laws of Nature are written in the language of mathematics...the symbols are triangles, circles and other geometrical figures, without whose help it is impossible to comprehend a single word.
Galileo Galilei
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It is surely harmful to souls to make it a heresy to believe what is proved.
Galileo Galilei
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I abjure with a sincere heart and unfeigned faith, I curse and detest the said errors and heresies, and generally all and every error and sect contrary to the Holy Catholic Church.
Galileo Galilei
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Philosophy itself cannot but benefit from our disputes, for if our conceptions prove true, new achievements will be made if false, their refutation will further confirm the original doctrines.
Galileo Galilei
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In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.
Galileo Galilei
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The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.
Galileo Galilei
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The Bible shows the way to go to heaven, not the way the heavens go.
Galileo Galilei
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Nature's great book is written in mathematics.
Galileo Galilei
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It is a beautiful and delightful sight to behold the body of the Moon.
Galileo Galilei