Quotes by: Galileo Galilei

Galileo Galilei
Portrait by Giusto Sustermans
Born (1564-02-15)15 February 1564
Pisa, Duchy of Florence, Italy
Died 8 January 1642(1642-01-08) (aged 77)
Arcetri, Grand Duchy of Tuscany, Italy
Residence Grand Duchy of Tuscany, Italy
Nationality Italian
Fields Astronomy, physics, engineering, natural philosophy, mathematics
Institutions University of Pisa
University of Padua
Patrons Cardinal del Monte
Fra Paolo Sarpi
Prince Federico Cesi
Cosimo II de Medici
Ferdinando II de Medici
Maffeo Barberini
Alma mater University of Pisa (no degree)
Academic advisors Ostilio Ricci[1]
Notable students Benedetto Castelli
Mario Guiducci
Vincenzo Viviani[2]
Known for Kinematics
Telescopic observational astronomy
His father was the musician Vincenzo Galilei. Galileo Galilei's mistress Marina Gamba (1570 – 21 August 1612?) bore him two daughters, (Maria Celeste (Virginia, 1600–1634) and Livia (1601–1659), both of whom became nuns), and a son, Vincenzo (1606–1649), a lutenist.

I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.
Galileo Galilei
Philosophy is written in this grand book, the universe, which stands continually open to our gaze. But the book cannot be understood unless one first learns to comprehend the language and read the letters in which it is composed.
Galileo Galilei
We cannot teach people anything; we can only help them discover it within themselves.
Galileo Galilei
I give infinite thanks to God, who has been pleased to make me the first observer of marvelous things.
Galileo Galilei
It is surely harmful to souls to make it a heresy to believe what is proved.
Galileo Galilei
I do not feel obliged to believe that the same God who has endowed us with sense, reason, and intellect has intended us to forgo their use.
Galileo Galilei
The sun, with all those planets revolving around it and dependent on it, can still ripen a bunch of grapes as if it had nothing else in the universe to do.
Galileo Galilei
The Milky Way is nothing else but a mass of innumerable stars planted together in clusters.
Galileo Galilei
If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.
Galileo Galilei
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.
Galileo Galilei
Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not.
Galileo Galilei
All truths are easy to understand once they are discovered; the point is to discover them.
Galileo Galilei
I have never met a man so ignorant that I couldn't learn something from him.
Galileo Galilei
It vexes me when they would constrain science by the authority of the Scriptures, and yet do not consider themselves bound to answer reason and experiment.
Galileo Galilei
Facts which at first seem improbable will, even on scant explanation, drop the cloak which has hidden them and stand forth in naked and simple beauty.
Galileo Galilei

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