Isaac Newton Quote

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“A man may imagine things that are false, but he can only understand things that are true, for if the things be false, the apprehension of them is not understanding.”

- Isaac Newton

Source/Notes: Theological Manuscripts: Selected and Edited with an Introd. by H. McLachlan, Sir Isaac Newton, University Press, 1950

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“Errors are not in the art but in the artificers.”

- Isaac Newton

Source/Notes: Philosophiae Naturalis Principia Mathematica (1687), Preface

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“I can calculate the motion of heavenly bodies, but not the madness of people.”

- Isaac Newton

Source/Notes: As quoted in: The Church of England Quarterly Review (1850), p. 142

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“If I have seen further than others, it is by standing upon the shoulders of giants.”

- Isaac Newton

Source/Notes: Letter to Robert Hooke (15 February 1676). Variant: "If I have seen further it is by standing on ye sholders of Giants."

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“It is the weight, not numbers of experiments that is to be regarded.”

- Isaac Newton

Source/Notes: Isaaci Newtoni Opera quae exstant omnia, Volume 4 (1782), p. 370, "Theory of Light and Colors"

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“To every action there is always opposed an equal reaction.”

- Isaac Newton

Source/Notes: Philosophiae Naturalis Principia Mathematica (1687), Laws of Motion, III

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“To me there has never been a higher source of earthly honor or distinction than that connected with advances in science.”

- Isaac Newton

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“To myself I am only a child playing on the beach, while vast oceans of truth lie undiscovered before me.”

- Isaac Newton

Source/Notes: Variant: izquotes.com/quotes/255708

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“We are to admit no more causes of natural things than such as are both true and sufficient to explain their appearances.”

- Isaac Newton

Source/Notes: Rules of Reasoning in Philosophy : Rule I - Philosophiae Naturalis Principia Mathematica (1687)

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“Amicus Plato — amicus Aristoteles — magis amica veritas”

- Isaac Newton

Source/Notes: Plato is my friend — Aristotle is my friend — but my greatest friend is truth.

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“To explain all nature is too difficult a task for any one man or even for any one age. 'Tis much better to do a little with certainty, & leave the rest for others that come after you, than to explain all things by conjecture without making sure of any thing.”

- Isaac Newton

Source/Notes: Statement from unpublished notes for the Preface to Opticks (1704)

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“I have studied these things — you have not.”

- Isaac Newton

Source/Notes: Newton's response, whenever Edmond Halley would say anything disrespectful of religion. As quoted in: The Life of Sir Isaac Newton (1831) by Sir David Brewster

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“I do not know what I may appear to the world, but to myself I seem to have been only like a boy playing on the sea-shore, and diverting myself in now and then finding a smoother pebble or a prettier shell than ordinary, whilst the great ocean of truth lay all undiscovered before me.”

- Isaac Newton

Source/Notes: Memoirs of the Life, Writings, and Discoveries of Sir Isaac Newton (1855) by Sir David Brewster (Volume II. Ch. 27)

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“Oh, Diamond! Diamond! thou little knowest what mischief thou hast done!”

- Isaac Newton

Source/Notes: This is from an anecdote found in St. Nicholas magazine, Vol. 5, No. 4, (February 1878)

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Isaac Newton Quote

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