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Isaac Newton Quotes | Quotes said by Isaac Newton

  • Isaac Newton Quote #1

    Kepler's laws, although not rigidly true, are sufficiently near to the truth to have led to the discovery of the law of attraction of the bodies of the solar system. The deviation from complete accuracy is due to the facts, that the planets are not of inappreciable mass, that, in consequence, they disturb each other's orbits about the Sun, and, by their action on the Sun itself, cause the periodic time of each to be shorter than if the Sun were a fixed body, in the subduplicate ratio of the mass of the Sun to the sum of the masses of the Sun and Planet; these errors are appreciable although very small, since the mass of the largest of the planets, Jupiter, is less than 1/1000th of the Sun's mass.


  • Isaac Newton Quote #2

    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 Quote #3

    A Vulgar Mechanick can practice what he has been taught or seen done, but if he is in an error he knows not how to find it out and correct it, and if you put him out of his road he is at a stand. Whereas he that is able to reason nimbly and judiciously about figure, force, and motion, is never at rest till he gets over every rub.
    (from a letter dated 25 May, 1694)

  • Isaac Newton Quote #4

    Amicus Plato — amicus Aristoteles — magis amica veritas. (Plato is my friend — Aristotle is my friend — but my greatest friend is truth.)

  • Isaac Newton Quote #5

    Blind metaphysical necessity, which is certainly the same always and every where, could produce no variety of things. All that diversity of natural things which we find suited to different times and places could arise from nothing but the ideas and will of a Being, necessarily existing.

  • Isaac Newton Quote #6

    eorum omnium actiones in se invicem

  • Isaac Newton Quote #7

    For every action, there is an equal and opposite reaction.

  • Isaac Newton Quote #8

    For I see not what there is desirable in publick esteeme, were I able to acquire & maintaine it. It would perhaps increase my acquaintance, the thing which I chiefly study to decline.

  • Isaac Newton Quote #9

    Genius is patience.

  • Isaac Newton Quote #10

    God who gave Animals self motion beyond our understanding is without doubt able to implant other principles of motion in bodies [which] we may understand as little. Some would readily grant this may be a Spiritual one; yet a mechanical one might be showne, did not I think it better to pass it by.

  • Isaac Newton Quote #11

    Gravity explains the motions of the planets, but it cannot explain who sets the planets in motion.

  • Isaac Newton Quote #12

    He who thinks half-heartedly will not believe in God; but he who really thinks has to believe in God.

  • Isaac Newton Quote #13

    How came the bodies of animals to be contrived with so much art, and for what ends were their several parts?
    Was the eye contrived without skill in Opticks, and the ear without knowledge of sounds?...and these things being rightly dispatch’d, does it not appear from phænomena that there is a Being incorporeal, living, intelligent...?

  • Isaac Newton Quote #14

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

  • Isaac Newton Quote #15

    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 Quote #16

    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 seashore, 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 Quote #17

    I was like a boy playing on the sea-shore, and diverting myself 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 Quote #18

    If I have done the public any service, it is due to my patient thought.

  • Isaac Newton Quote #19

    In the absence of any other proof, the thumb alone would convince me of God's existence.

  • Isaac Newton Quote #20

    In the beginning of the year 1665 I found the Method of approximating series & the Rule for reducing any dignity of any Binomial into such a series. The same year in May I found the method of Tangents of Gregory & Slusius, & in November had the direct method of fluxions & the next year in January had the Theory of Colours & in May following I had entrance into ye inverse method of fluxions. And the same year I began to think of gravity extending to ye orb of the Moon & (having found out how to estimate the force with wch [a] globe revolving within a sphere presses the surface of the sphere) from Kepler's rule of the periodic times of the Planets being in sesquialterate proportion of their distances from the center of their Orbs, I deduced that the forces wch keep the Planets in their Orbs must [be] reciprocally as the squares of their distances from the centers about wch they revolve: & thereby compared the force requisite to keep the Moon in her Orb with the force of gravity at the surface of the earth, & found them answer pretty nearly. All this was in the two plague years of 1665-1666. For in those days I was in the prime of my age for invention & minded Mathematicks & Philosophy more then than at any time since.

  • Isaac Newton Quote #21

    Les hommes construisent trop de murs et pas assez de ponts.

  • Isaac Newton Quote #22

    Lo que sabemos es una gota de agua; lo que ignoramos es un océano.

  • Isaac Newton Quote #23

    My powers are ordinary. Only my application brings me success.

  • Isaac Newton Quote #24

    Nature is pleased with simplicity. And nature is no dummy

  • Isaac Newton Quote #25

    No great discovery was ever made without a bold guess.

  • Isaac Newton Quote #26

    No old Men (excepting Dr. Wallis) love Mathematicks.

  • Isaac Newton Quote #27

    Plato is my friend, Aristotle is my friend, but my greatest friend is truth.

  • Isaac Newton Quote #28

    Plato is my friend; Aristotle is my friend, but my greatest friend is truth.

  • Isaac Newton Quote #29

    Tact is the art of making a point without making an enemy.

  • Isaac Newton Quote #30

    The more time and devotion one spends in the worship of false gods, the less he is able to spend in that of the True One.

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