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They who depend upon manifest observations will philosophize better than those who persist in opinions repugnant to the senses.

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
Opinions
Observation
Senses
Philosophize
Repugnant
Depends
Observations
Opinion
Persist
Upon
Manifest
Better
Depend

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It is surely harmful to souls to make it a heresy to believe what is proved.
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I have never met a man so ignorant that I couldn't learn something from him.
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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.
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With regard to matters requiring thought: the less people know and understand about them, the more positively they attempt to argue concerning them.
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See now the power of truth.
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Nature is written in mathematical language.
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In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.
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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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To excite in us tastes, odors, and sounds I believe that nothing is required in external bodies except shapes, numbers, and slow or rapid movements. ... if ears, tongues, and noses were removed, shapes and numbers and motions would remain, but not odors or tastes or sounds.
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The greatest wisdom is to get to know oneself.
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Nonetheless, it moves.
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The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.
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But some, besides allegiance to their original error, possess I know not what fanciful interest in remaining hostile not so much toward the things in question as toward their discoverer.
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To understand the Universe, you must understand the language in which it's written, the language of Mathematics.
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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.
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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.
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I do not know what to say in a case so surprising, so unlooked for and so novel.
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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.
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By denying scientific principles, one may maintain any paradox.
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