Galileo Galilei was a famous Italian physicist, astronomer and philosopher, universally known as “Father of Science”. Many modern day inventions and discoveries were possible only due to the theories and hypothesis he proposed during the 17th century. His contributions include telescopic confirmation of Phases of Venus, Satellites of Jupiter (named Galilean moon), Military Compass and Global Satellite Navigation System. His written works include ‘The Little Balance’, ‘The Starry Messenger’ and ‘Letter to the Grand Duchess Christina’. His works and writings express his thoughts on several subjects such as philosophy, astronomy, God, religion and scriptures and these have become quite popular as his quotes. In honor of this great philosopher, a low cost telescope with high quality named Galileoscope was released in 2009 enabling numerous people to view the same things that the Legend himself saw. Many references of Galileo have been made in modern age plays, songs and theatres. Go through these inspiring and philosophical thoughts, sayings and quotes by Galileo Galilei on evolution, wisdom, faith, experiment, belief, art, teaching, reason, truth, nature, math, astronomy, observation, opinion, authority, beauty and religion.
And who can doubt that it will lead to the worst disorders when minds created free by God are compelled to submit slavishly to an outside will? When we are told to deny our senses and subject them to the whim of others? When people devoid of whatsoever competence are made judges over experts and are granted authority to treat them as they please? These are the novelties which are apt to bring about the ruin of commonwealths and the subversion of the state.
The prohibition of science would be contrary to the Bible, which in hundreds of places teaches us how the greatness and the glory of God shine forth marvelously in all His works, and is to be read above all in the open book of the heavens.
Nature is relentless and unchangeable, and it is indifferent as to whether its hidden reasons and actions are understandable to man or not.
Two truths cannot contradict one another.
I do not think it is necessary to believe that the same God who has given us our senses, reason, and intelligence wished us to abandon their use, giving us by some other means the information that we could gain through them.
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.
Oh, my dear Kepler, how I wish that we could have one hearty laugh together. Here, at Padua, is the principal professor of philosophy, whom I have repeatedly and urgently requested to look at the moon and planets through my glass, [telescope] which he pertinaciously refuses to do. Why are you not here? what shouts of laughter we should have at this glorious folly! and to hear the professor of philosophy at Pisa laboring before the grand duke with logical arguments, as if with magical incantations, to charm the new planets out of the sky.
It seems to me that it was well said by Madama Serenissima, and insisted on by your reverence, that the Holy Scripture cannot err, and that the decrees therein contained are absolutely true and inviolable. But I should have in your place added that, though Scripture cannot err, its expounders and interpreters are liable to err in many ways; and one error in particular would be most grave and most frequent, if we always stopped short at the literal signification of the words.
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
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.
In the long run my observations have convinced me that some men, reasoning preposterously, first establish some conclusion in their minds which, either because of its being their own or because of their having received it from some person who has their entire confidence, impresses them so deeply that one finds it impossible ever to get it out of their heads.
Surely, God could have caused birds to fly with their bones made of solid gold, with their veins full of quicksilver, with their flesh heavier than lead, and with their wings exceedingly small. He did not, and that ought to show something. It is only in order to shield your ignorance that you put the Lord at every turn to the refuge of a miracle.
In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.
Scripture is a book about going to Heaven. It's not a book about how the heavens go.
All truths are easy to understand once they are discovered; the point is to discover them.
The greatest wisdom is to get to know oneself.
Passion is the genesis of genius.
The book of nature is written in the language of mathematics.
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.
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.
I wish, my dear Kepler, that we could have a good laugh together at the extraordinary stupidity of the mob. What do you think of the foremost philosophers of this University? In spite of my oft-repeated efforts and invitations, they have refused, with the obstinacy of a glutted adder, to look at the planets or the Moon or my glass [telescope].
There are those who reason well, but they are greatly outnumbered by those who reason badly.
It is a beautiful and delightful sight to behold the body of the Moon.
Nature...does not act by means of many things when it can do so by means of a few.
Measure what can be measured, and make measurable what cannot be measured.
In regard to the philosophers, if they be true philosophers, i.e., lovers of truth, they should not be irritated that the earth moves. Rather, if they realize that they have held a false belief, they should thank those have shown them the truth; and if their opinion stands firm that the earth doesn't move, they will have reason to boast than be angered.