Galileo Galilei Quote

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

- Galileo Galilei

Source/Notes: This quote is a paraphrase of a conversation between two characters in Galileo's book "Dialogue Concerning the Two Chief World Systems" (1632): "SALVIATI: Now you see how easy it is to understand. / SAGREGO: So are all truths, once they are discovered."

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“And yet it moves.”

- Galileo Galilei

Source/Notes: "Eppur si muove." - Supposedly said in 1632 before the Inquisition after being forced to deny that the earth moves around the sun. Earliest report of this quote can be found in the book "The Italian Library" by Giuseppe Baretti, published in 1757.

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“By denying scientific principles, one may maintain any paradox.”

- Galileo Galilei

Source/Notes: Paraphrase. Dialogue Concerning the Two Chief World Systems (1632), "The First Day"

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“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

Source/Notes: Dialogues Concerning Two New Sciences by Galileo Galilei, translated by Henry Crew and Alfonso De Salvio, Cosimo, Inc., 2010 edition, p. 5, "First Day" - ISBN: 9781616401894

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“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

Source/Notes: Letter to the Grand Duchess Christina (1615)

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“I have never met a man so ignorant that I couldn't learn something from him.”

- Galileo Galilei

Source/Notes: Attributed. Earliest attribution found: The Story of Civilization: The Age of Reason Begins, 1558-1648 (1935) by Will Durant, p. 605

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

- Galileo Galilei

Source/Notes: Recantation (June 22, 1633). Reported in: "The Encyclopædia Britannica, or, Dictionary of arts, sciences, and general literature, Volume 10" (1856), p. 377

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“If I were again beginning my studies, I would follow the advice of Plato and start with mathematics.”

- Galileo Galilei