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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
Doubt
Seen
Eyes
Scruple
Upon
Scruples
Eye
Contradict
Things
Cast
Casts
Merely

More quotes by Galileo Galilei

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In time you may discover everything that can be discovered, and still your progress will only be progress away from humanity. The distance between you and them can one day become so great that your joyous cry over some new gain could be answered by an universal shriek of horror.
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But, because my private lectures and domestic pupils are a great hinderance and intteruption of my studies, I wish to live entirely exempt from the former, and in great measure from the latter. ... in short, I should wish to gain my bread from my writings.
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One can understand nature only when one has learned the language and the signs in which it speaks to us but this language is mathematics and these signs are methematical figures.
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By denying scientific principles, one may maintain any paradox.
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Nature's great book is written in mathematics.
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The number of people that can reason well is much smaller than those that can reason badly. If reasoning were like hauling rocks, then several reasoners might be better than one. But reasoning isn't like hauling rocks, it's like, it's like racing, where a single, galloping Barbary steed easily outruns a hundred wagon-pulling horses.
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The Universe is a grand book which cannot be read until one first learns to comprehend the language and become familiar with the characters in which it is composed. It is written in the language of mathematics.
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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.
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I have never met a man so ignorant that I couldn't learn something from him.
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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.
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Holy Scripture could never lie or err...its decrees are of absolute and inviolable truth.
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My dear Kepler, what would you say of the learned here, who, replete with the pertinacity of the asp, have steadfastly refused to cast a glance through the telescope? What shall we make of this? Shall we laugh, or shall we cry?
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Nature is written in mathematical language.
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Science proceeds more by what it has learned to ignore than what it takes into account.
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There are those who reason well, but they are greatly outnumbered by those who reason badly.
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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.
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It is surely harmful to souls to make it a heresy to believe what is proved.
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They know that it is human nature to take up causes whereby a man may oppress his neighbor, no matter how unjustly. ... Hence they have had no trouble in finding men who would preach the damnability and heresy of the new doctrine from the very pulpit.
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You can't teach anybody anything, only make them realize the answers are already inside them.
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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.
Galileo Galilei