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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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Galileo Galilei
Age: 77 †
Born: 1564
Born: February 15
Died: 1642
Died: January 8
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More quotes by Galileo Galilei

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You can't teach anybody anything, only make them realize the answers are already inside them.
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Knowing thyself, that is the greatest wisdom.
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Nature is written in mathematical language.
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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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I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.
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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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There are those who reason well, but they are greatly outnumbered by those who reason badly.
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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.
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Long experience has taught me this about the status of mankind with regard to matters requiring thought: the less people know and understand about them, the more positively they attempt to argue concerning them, while on the other hand to know and understand a multitude of things renders men cautious in passing judgment upon anything new.
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The greatest wisdom is to get to know oneself.
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I have never met a man so ignorant that I couldn't learn something from him.
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They who depend upon manifest observations will philosophize better than those who persist in opinions repugnant to the senses.
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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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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.
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Measure what can be measured, and make measureable what cannot be measured.
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The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.
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Nature's great book is written in mathematics.
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Holy Scripture could never lie or err...its decrees are of absolute and inviolable truth.
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Wine is sunlight, held together by water.
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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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