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Home > Dictionary of Science Quotations > Scientist Names Index G > Galileo Galilei Quotes > Religion

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Galileo Galilei
(15 Feb 1564 - 8 Jan 1642)

Italian natural philosopher who believed the Earth revolved around the Sun. For this, he was interrogated by the Inquisition, was put on trial, found guilty and sentenced to indefinite imprisonment. For renouncing his former beliefs before the Cardinals that judged him, he was allowed to serve this time instead under house-arrest.


Galileo Galilei Quotes on Religion (6 quotes)

>> Click for 53 Science Quotes by Galileo Galilei

>> Click for Galileo Galilei Quotes on | Heliocentric Model | Moon | Observation | Telescope |

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
Letter to Cristina di Lorena, Grand Duchess of Tuscany (the mother of his patron Cosmo), 1615. Quoted in Sedley Taylor, 'Galileo and Papal Infallibility' (Dec 1873), in Macmillan's Magazine: November 1873 to April 1874 (1874) Vol 29, 94.
Science quotes on:  |  Church (30)  |  Contract (8)  |  Demonstration (51)  |  Difference (208)  |  Mortgage (2)  |  Nature (1029)  |  Opinion (146)  |  Permissible (3)  |  Professor (39)  |  Religion (210)

I would say here something that was heard from an ecclesiastic of the most eminent degree [Cardinal Baronius (1538-1607)]: “That the intention of the holy ghost is to teach us how one goes to heaven, not how heaven goes.”
— Galileo Galilei
Letter to Madame Christina of Lorraine, Grand Duchess of Tuscany: concerning the Use of Biblical Quotations in Matters of Science (1611 5), trans. Stillman Drake, Discoveries and Opinions of Galileo (1957), 186.
Science quotes on:  |  Religion (210)

I, Galileo Galilei, son of the late Vincenzo Galilei, of Florence, aged seventy years, being brought personally to judgment, and kneeling before your Most Eminent and Most Reverend Lords Cardinals, General Inquisitors of the universal Christian republic against heretical depravity, having before my eyes the Holy Gospels, which I touch with my own hands, swear that I have always believed, and now believe, and with the help of God will in future believe, every article which the Holy Catholic and Apostolic Church of Rome holds, teaches, and preaches. But because I have been enjoined by this Holy Office altogether to abandon the false opinion which maintains that the sun is the centre and immovable, and forbidden to hold, defend, or teach the said false doctrine in any manner, and after it hath been signified to me that the said doctrine is repugnant with the Holy Scripture, I have written and printed a book, in which I treat of the same doctrine now condemned, and adduce reasons with great force in support of the same, without giving any solution, and therefore have been judged grievously suspected of heresy; that is to say, that I held and believed that the sun is the centre of the universe and is immovable, and that the earth is not the centre and is movable; willing, therefore, to remove from the minds of your Eminences, and of every Catholic Christian, this vehement suspicion rightfully entertained toward me, with a sincere heart and unfeigned faith, I abjure, curse, and detest the said errors and heresies, and generally every other error and sect contrary to Holy Church; and I swear that I will never more in future say or assert anything verbally, or in writing, which may give rise to a similar suspicion of me; but if I shall know any heretic, or anyone suspected of heresy, that I will denounce him to this Holy Office, or to the Inquisitor or Ordinary of the place where I may be; I swear, moreover, and promise, that I will fulfil and observe fully, all the penances which have been or shall be laid on me by this Holy Office. But if it shall happen that I violate any of my said promises, oaths, and protestations (which God avert!), I subject myself to all the pains and punishments which have been decreed and promulgated by the sacred canons, and other general and particular constitutions, against delinquents of this description. So may God help me, and his Holy Gospels which I touch with my own hands. I, the above-named Galileo Galilei, have abjured, sworn, promised, and bound myself as above, and in witness thereof with my own hand have subscribed this present writing of my abjuration, which I have recited word for word. At Rome, in the Convent of Minerva, June 22, 1633. I, Galileo Galilei, have abjured as above with my own hand.
— Galileo Galilei
Abjuration, 22 Jun 1633
Science quotes on:  |  Abjuration (2)  |  Heliocentric Model (7)  |  Religion (210)

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
Note added by Galileo in the preliminary leaves of his copy of Dialogue on the Great World Systems (1632).
Science quotes on:  |  Heliocentric Model (7)  |  Religion (210)

You have read my writings, and from them you have certainly understood which was the true and real motive that caused, under the lying mask of religion, this war against me that continually restrains and undercuts me in all directions, so that neither can help come to me from outside nor can I go forth to defend myself, there having been issued an express order to all Inquisitors that they should not allow any of my works to be reprinted which had been printed many years ago or grant permission to any new work that I would print. … a most rigorous and general order, I say, against all my works, omnia et edenda; so that it is left to me only to succumb in silence under the flood of attacks, exposures, derision, and insult coming from all sides.
— Galileo Galilei
Science quotes on:  |  Allow (24)  |  Attack (29)  |  Defend (20)  |  Derision (6)  |  Exposure (5)  |  Express (32)  |  Flood (26)  |  Grant (21)  |  Inquisitor (6)  |  Insult (5)  |  Order (167)  |  Permission (5)  |  Print (9)  |  Restrain (5)  |  Science And Religion (267)  |  Silence (32)  |  Succumb (4)  |  Year (214)

You have read my writings, and from them you have certainly understood which was the true and real motive that caused, under the lying mask of religion, this war against me that continually restrains and undercuts me in all directions, so that neither can help come to me from outside nor can I go forth to defend myself, there having been issued an express order to all Inquisitors that they should not allow any of my works to be reprinted which had been printed many years ago or grant permission to any new work that I would print. … a most rigorous and general order, I say, against all my works, omnia et edenda; so that it is left to me only to succumb in silence under the flood of attacks, exposures, derision, and insult coming from all sides.
— Galileo Galilei
In Letter to Nicolas-Claude Fabri de Peiresc (16 Mar 1635). As quoted in translation in Giorgio de Santillana, The Crime of Galileo (1976), 324, with footnote that “he had known about the reserved orders to the provincial Inquisitors from Micanzio in Venice. On September 8, 1633, the Pope had further reprimanded the Inquisitor of Florence for giving permission to reprint some past works.”


See also:
  • 15 Feb - short biography, births, deaths and events on date of Galilei's birth.
  • Galileo Galilei - Quotations - Abjuration
  • Galileo Gailei - biography from Famous Men of Science (1889).
  • Galileo - “And Yet It Moves” illustrated quote - Medium 500px
  • Galileo - “And Yet It Moves” illustrated quote - Large 800px
  • Galileo: A Life, by James Reston. - book suggestion.
  • Booklist for Galileo Galilei.

Carl Sagan Thumbnail In science it often happens that scientists say, 'You know that's a really good argument; my position is mistaken,' and then they would actually change their minds and you never hear that old view from them again. They really do it. It doesn't happen as often as it should, because scientists are human and change is sometimes painful. But it happens every day. I cannot recall the last time something like that happened in politics or religion. (1987) -- Carl Sagan
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