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Knowing thyself, that is the greatest wisdom.

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
Thyself
Greatest
Wisdom
Knowing

More quotes by 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.
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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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To be humane, we must ever be ready to pronounce that wise, ingenious and modest statement 'I do not know'.
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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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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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They seemed to forget that the increase of known truths stimulates the investigation, establishment and growth of the arts not their dimination or destruction.
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By denying scientific principles, one may maintain any paradox.
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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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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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All truths are easy to understand once they are discovered the point is to discover them.
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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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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.
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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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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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Who would dare assert that we know all there is to be known?
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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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You can't teach anybody anything, only make them realize the answers are already inside them.
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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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It is a beautiful and delightful sight to behold the body of the Moon.
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