I therefore concluded, and decided unhesitatingly, that there are three stars in the heavens moving about Jupiter, as Venus and Mercury about the Sun; which at length was established as clear as daylight by numerous other observations. Galileo Galilei More Quotes by Galileo Galilei More Quotes From Galileo Galilei God is known by nature in his works, and by doctrine in his revealed word. Galileo Galilei doctrine known Where the senses fail us, reason must step in. Galileo Galilei failing perception steps Holy Scripture could never lie or err...its decrees are of absolute and inviolable truth. Galileo Galilei scripture bible lying You may force me to say what you wish; you may revile me for saying what I do. But it moves. Galileo Galilei wish may moving 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. Galileo Galilei men long hands 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. Galileo Galilei philosophy book lying You cannot teach a person something he does not already know, you can only bring what he does know to his awareness. Galileo Galilei education motivational inspirational The book of nature is written in the language of mathematics. Galileo Galilei language math book In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual. Galileo Galilei independent inspiration truth Mathematics is the key and door to the sciences. Galileo Galilei keys science knowledge Nothing occurs contrary to nature except the impossible, and that never occurs. Galileo Galilei contrary impossible 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. Galileo Galilei understanding perfect science Who would dare assert that we know all there is to be known? Galileo Galilei dare known knows The greatest wisdom is to get to know oneself. Galileo Galilei knowing-oneself greatest-wisdom oneself 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. Galileo Galilei horse rocks numbers Measure what is measurable, and make measurable what is not so. Galileo Galilei metrics statistics math The deeper I go in considering the vanities of popular reasoning, the lighter and more foolish I find them. What greater stupidity can be imagined than that of calling jewels, silver, and gold "precious," and earth and soil "base"? Galileo Galilei vanity stupidity jewels Nature . . . is inexorable and immutable; she never transgresses the laws imposed upon her, nor cares a whit whether her abstruse reasons and methods of operations are understandable to men. Galileo Galilei nature law men Science proceeds more by what it has learned to ignore than what it takes into account. Galileo Galilei accounts science With regard to matters requiring thought: the less people know and understand about them, the more positively they attempt to argue concerning them. Galileo Galilei matter arguing people
