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Isaac Newton

Sir Isaac Newton, FRS , was an English physicist, mathematician, astronomer, natural philosopher, and alchemist. His Philosophiæ Naturalis Principia Mathematica, published in 1687, is considered to be the most influential book in the history of science. In this work, Newton described universal gravitation and the three laws of motion, laying the groundwork for classical mechanics, which dominated the scientific view of the physical universe for the next three centuries and is the basis for modern engineering. Newton showed that the motions of objects on Earth and of celestial bodies are governed by the same set of natural laws by demonstrating the consistency between Kepler's laws of planetary motion and his theory of gravitation, thus removing the last doubts about heliocentrism and advancing the scientific revolution.

In mechanics, Newton enunciated the principles of conservation of momentum and angular momentum. In optics, he invented the reflecting telescope and developed a theory of colour based on the observation that a prism decomposes white light into a visible spectrum. He also formulated an empirical law of cooling and studied the speed of sound.

In mathematics, Newton shares the credit with Gottfried Leibniz for the development of the differential and integral calculus. He also demonstrated the generalised binomial theorem, developed the so-called "Newton's method" for approximating the zeroes of a function, and contributed to the study of power series.

Newton was also highly religious (though unorthodox), producing more work on Biblical hermeneutics than the natural science he is remembered for today.

In a 2005 poll of the Royal Society asking who had the greater effect on the history of science, Newton was deemed much more influential than Albert Einstein.


“Yet one thing secures us what ever betide, the scriptures assures us that the Lord will provide.”
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“Deus é capaz de criar partículas de matéria de diversos tamanhos e formas...e talvez de diferentes densidades e forças e, portanto, de variar as leis da natureza e fazer mundos de diversos tipos em várias partes do universo. Pelo menos não vejo contradição alguma em tudo isso.”
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“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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“He who thinks half-heartedly will not believe in God; but he who really thinks has to believe in God.”
Isaac Newton
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“If I have seen further than others, it is by standing upon the shoulders of giants.”
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”
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“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.”
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“What goes up must come down.”
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“eorum omnium actiones in se invicem”
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“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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“God without dominion, providence, and final causes, is nothing else but Fate and Nature. Blind metaphysical necessity, which is certainly the same always and everywhere, 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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“Truth is ever to be found in the simplicity, and not in the multiplicity and confusion of things.”
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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 than to explain all things by conjecture without making sure of any thing.”
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“No great discovery was ever made without a bold guess.”
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“Nature is pleased with simplicity. And nature is no dummy”
Isaac Newton
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“What we know is a drop, what we don't know is an ocean.”
Isaac Newton
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“Gravity explains the motions of the planets, but it cannot explain who sets the planets in motion.”
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“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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“This most beautiful system of the sun, planets and comets, could only proceed from the counsel and dominion of an intelligent and powerful Being...This Being governs all things, not as the soul of the world, but as Lord over all; and on account of his dominion he is wont, to be called Lord God παντοκρατωρ or Universal Ruler.”
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“Trials are medicines which our gracious and wise Physician prescribes because we need them; and he proportions the frequency and weight of them to what the case requires. Let us trust his skill and thank him for his prescription.”
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“Whence arises all that order and beauty we see in the world?”
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“What Descartes did was a good step. You have added much several ways, and especially in taking the colours of thin plates into philosophical consideration. If I have seen a little further it is by standing on the shoulders of Giants.”
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“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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“Les hommes construisent trop de murs et pas assez de ponts. ”
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“Tact is the knack of making a point without making an enemy.”
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“and to every action there is always an equal and opposite or contrary, reaction”
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“I can calculate the motion of heavenly bodies but not the madness of people.”
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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.”
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“Los hombres construimos demasiados muros y no suficientes puentes.”
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“If I have seen further it is by standing on the shoulders of Giants.”
Isaac Newton
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