Galileo Galilei Quotes About Science

Quotes about: Science

• All truths are easy to understand once they are discovered; the point is to discover them.

  Galileo Galilei

  Inspirational, Truth, Science

  "Angels in the workplace: stories and inspirations for creating a new world of work". Book by Melissa Giovagnoli, 1999.

• Mathematics is the language with which God has written the universe.

  Galileo Galilei

  Learning, Science, Discovery

• In questions of science, the authority of a thousand is not worth the humble reasoning of a single individual.

  Galileo Galilei

  Truth, Inspiration, Independent

  "Biographies of Distinguished Scientific Men". Book by François Arago, as translated by Baden Powell, Robert Grant, and William Fairbairn, p. 365, 1859.

• 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.

  Galileo Galilei

  Philosophy, Book, Mean

• The Bible shows the way to go to heaven, not the way the heavens go.

  Galileo Galilei

  Science, Heaven, Way

• I do not feel obliged to believe that the same God who has endowed us with senses, reason, and intellect has intended us to forego their use.

  Galileo Galilei

  Spiritual, Atheist, Believe

  "Letter to the Grand Duchess Christina". Essay by Galileo Galilei, 1615.

• Take note, theologians, that in your desire to make matters of faith out of propositions relating to the fixity of sun and earth you run the risk of eventually having to condemn as heretics those who would declare the earth to stand still and the sun to change position-eventually, I say, at such a time as it might be physically or logically proved that the earth moves and the sun stands still.

  Galileo Galilei

  Running, Moving, Science

  Galileo Galilei (1967). “Dialogue Concerning the Two Chief World Systems, Ptolemaic and Copernican, Second Revised Edition”, p.5, Univ of California Press

• 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

  Science, Perfect, Understanding

  Galileo Galilei (1967). “Dialogue Concerning the Two Chief World Systems, Ptolemaic and Copernican, Second Revised Edition”, p.101, Univ of California Press

• By denying scientific principles, one may maintain any paradox.

  Galileo Galilei

  Science, Religion, Principles

• Mathematics is the key and door to the sciences.

  Galileo Galilei

  Knowledge, Science, Keys

  Attributed to Galileo Galilei in "Building Fluency Through Practice and Performance" by Timothy Rasinski and Lorraine Griffith (p. 64), 2008.

• Nature's great book is written in mathematics.

  Galileo Galilei

  Book, Math, Science

• I think that in the discussion of natural problems we ought to begin not with the Scriptures, but with experiments, and demonstrations.

  Galileo Galilei

  Science, Thinking, Scripture

  "Pale Blue Dot". Book by Carl Sagan (p. 43), 1994.

• But what exceeds all wonders, I have discovered four new planets and observed their proper and particular motions, different among themselves and from the motions of all the other stars; and these new planets move about another very large star [Jupiter] like Venus and Mercury, and perchance the other known planets, move about the Sun. As soon as this tract, which I shall send to all the philosophers and mathematicians as an announcement, is finished, I shall send a copy to the Most Serene Grand Duke, together with an excellent spyglass, so that he can verify all these truths.

  Galileo Galilei

  Stars, Moving, Science

  "Sidereus Nuncius, Or The Sidereal Messenger". Book by Galileo Galilei, March 13, 1610.

• Spots are on the surface of the solar body where they are produced and also dissolved, some in shorter and others in longer periods. They are carried around the Sun; an important occurrence in itself.

  Galileo Galilei

  Science, Important, Body

• I cannot but be astonished that Sarsi should persist in trying to prove by means of witnesses something that I may see for myself at any time by means of experiment. Witnesses are examined in doutbful matters which are past and transient, not in those which are actual and present. A judge must seek by means of witnesses to determine whether Peter injured John last night, but not whether John was injured, since the judge can see that for himself.

  Galileo Galilei

  Truth, Mean, Science

• 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

  Stars, Moving, Science

  "The English Renaissance: An Anthology of Sources and Document". Book by Kate Aughterson (p. 383), June 1, 2002.

• We see only the simple motion of descent, since that other circular one common to the Earth, the tower, and ourselves remains imperceptible. There remains perceptible to us only that of the stone, which is not shared by us; and, because of this, sense shows it as by a straight line, always parallel to the tower, which is built upright and perpendicular upon the terrestrial surface.

  Galileo Galilei

  Science, Simple, Towers

• It reveals to me the causes of many natural phenomena that are entirely incomprehensible in the light of the generally accepted hypotheses. To refute the latter I collected many proofs, but I do not publish them ... I would dare to publish my speculations if there were people men like you.

  Galileo Galilei

  Science, Men, Light

  Letter to Johannes Kepler, 1596.

• Among the great men who have philosophized about [the action of the tides], the one who surprised me most is Kepler. He was a person of independent genius, [but he] became interested in the action of the moon on the water, and in other occult phenomena, and similar childishness.

  Galileo Galilei

  Independent, Science, Moon

• 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].

  Galileo Galilei

  Science, Thinking, Moon

• 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.

  Galileo Galilei

  Science, Moon, Night

• Their vain presumption of knowing all can take beginning solely from their never having known anything; for if one has but once experienced the perfect knowledge of one thing, and truly tasted what it is to know, he shall perceive that of infinite other conclusions he understands not so much as one.

  Galileo Galilei

  Knowledge, Science, Knowing

• 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.

  Galileo Galilei

  Laughter, Philosophy, Science

• Science proceeds more by what it has learned to ignore than what it takes into account.

  Galileo Galilei

  Science, Accounts

• I would beg the wise and learned fathers (of the church) to consider with all diligence the difference which exists between matters of mere opinion and matters of demonstration. ... [I]t is not in the power of professors of the demonstrative sciences to alter their opinions at will, so as to be now of one way of thinking and now of another. ... [D]emonstrated conclusions about things in nature of the heavens, do not admit of being altered with the same ease as opinions to what is permissible or not, under a contract, mortgage, or bill of exchange.

  Galileo Galilei

  Wise, Nature, Father

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