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Galileo Galilei

Galileo Galilei Quotes

Physicist

Galileo Galilei, an Italian physicist, astronomer, mathematician, and philosopher, is considered the father of modern science. He was born on February 15, 1564, and died on January 8, 1642. Galileo made significant contributions to the fields of physics, astronomy, mathematics, and philosophy. He discovered the four moons of Jupiter through his telescope, supporting Copernicus' heliocentric model, and proposed the law of free fall and other scientific theories.

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Famous Galileo Galilei Quotes

“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.”

Thinking Believe Book Different Philosophy Character Eye Written Alphabet

Author:Galileo Galilei

“Nothing physical which sense-experience sets before our eyes, or which necessary demonstrations prove to us, ought to be called in question (much less condemned) upon the testimony of biblical passages...”

Thinking Eye Ought Prove Passages Biblical Testimony Demonstration

Author:Galileo Galilei

“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.”

Eye Stars Numbers Vision Ten Increase Familiar Great Things Fixed Visible Host Exposing

Author:Galileo Galilei

“If experiments are performed thousands of times at all seasons and in every place without once producing the effects mentioned by your philosophers, poets, and historians, this will mean nothing and we must believe their words rather than our own eyes?”

Ifs Believe Mean Eye Effects Poet Seasons Philosopher Experiments Historian

Author:Galileo Galilei

“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.”

Said Eye Doubt Casts Again And Again Scruples

Author:Galileo Galilei

“Philosophy [nature] is written in that great book which ever is 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. The book is written in mathematical language, and the symbols are triangles, circles and other geometrical figures, without whose help it is impossible to comprehend a single word of it; without which one wanders in vain through a dark labyrinth.”

“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.”

Ifs Firsts Mean Book Philosophy Eye Lying Universe Language Written Symbols Great Book Triangles

Author:Galileo Galilei

“The number of the fixed stars which observers have been able to see without artificial powers of sight up to this day can be counted. It is therefore decidedly a great feat to add to their number, and to set distinctly before the eyes other stars in myriads, which have never been seen before, and which surpass the old, previously known stars in number more than ten times.”

Has Beens Eye Able Stars Numbers Known Ten Sight Add Fixed This Day Artificial Observers Feats

Author:Galileo Galilei