Isaac Newton Quotes

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1. “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.”

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Author : Isaac Newton

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

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Author : Isaac Newton

3. “If I have seen further it is by standing on the shoulders of Giants.”

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Author : Isaac Newton
Source : The Correspondence Of Isaac Newton

4. “No great discovery was ever made without a bold guess.”

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Author : Isaac Newton

5. “Nature is pleased with simplicity. And nature is no dummy”

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Author : Isaac Newton

6. “Truth is ever to be found in the simplicity, and not in the multiplicity and confusion of things.”

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Author : Isaac Newton

7. “What goes up must come down.”

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Author : Isaac Newton

8. “Tact is the knack of making a point without making an enemy.”

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Author : Isaac Newton

9. “If I have ever made any valuable discoveries, it has been due more to patient attention, than to any other talent”

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Author : Isaac Newton

10. “Plato is my friend, Aristotle is my friend, but my greatest friend is truth.”

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Author : Isaac Newton

11. “There are more sure marks of authenticity in the Bible that in any profane history”

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Author : Isaac Newton

12. “As a blind man has no idea of colors, so have we no idea of the manner by which the all-wise God perceives and understands all things”

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Author : Isaac Newton

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

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Author : Isaac Newton

14. “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...?”

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Author : Isaac Newton
Source : Opticks

15. “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.”

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Author : Isaac Newton
Source : The Principia: Mathematical Principles of Natural Philosophy

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

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Author : Isaac Newton

17. “This most beautiful system of the sun, planets and comets, could only proceed from the counsel and dominion of an intelligent and powerful Being.”

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Author : Isaac Newton
Source : The Principia: Mathematical Principles of Natural Philosophy

18. “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.”

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Author : Isaac Newton
Source : The Principia: Mathematical Principles of Natural Philosophy

19. “No old Men (excepting Dr. Wallis) love Mathematicks.”

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Author : Isaac Newton

20. “If I have been able to see further, it was only because I stood on the shoulders of giants.”

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Author : Isaac Newton

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

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Author : Isaac Newton

22. “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.”

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Author : Isaac Newton

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

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Author : Isaac Newton

24. “This principle of nature being very remote from the conceptions of Philosophers, I forbore to describe it in that book, least I should be accounted an extravagant freak and so prejudice my Readers against all those things which were the main designe of the book.”

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Author : Isaac Newton
Source : Opticks

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

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Author : Isaac Newton
Source : Quotations by Isaac Newton

26. “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)”

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Author : Isaac Newton

27. “I have studied these things - you have not.”

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Author : Isaac Newton

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

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Author : Isaac Newton

29. “To explain all nature is too difficult a task for any one man or even for any one age”

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Author : Isaac Newton

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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Author : Isaac Newton

31. “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.”

Tags : God Metaphysics Motion Nature
Author : Isaac Newton
Source : The Correspondence of Isaac Newton: Published for the Royal Society. VOLUMES 1 through 7

32. “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.”

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Author : Isaac Newton

33. “They who search after the Philosopher's Stone [are] by their own rules obliged to a strict and religious life.”

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Author : Isaac Newton