“Of the many references to Newton in 18th-century electrical writings only a small number were to the Principia, the greater part by far were to the Opticks. This was true not alone of the electrical writings but also in other fields of experimental enquiry…. [The Opticks] would allow the reader to roam, with great Newton as his guide, through the major unresolved problems of science and even the relation of the whole world of nature to Him who had created it…. in the Opticks Newton did not adopt the motto… —Hypotheses non fingo; I frame no hypotheses—but, so to speak, let himself go, allowing his imagination full reign and by far exceeding the bounds of experimental evidence.”

—  I. Bernard Cohen

I. Bernard Cohen, Preface to Opticks by Sir Isaac Newton (1952)

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American historian of science 1914–2003

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“Of the many references to Newton in 18th-century electrical writings only a small number were to the Principia, the greater part by far were to the Opticks.”

I. Bernard Cohen (1914–2003) American historian of science

This was true not alone of the electrical writings but also in other fields of experimental enquiry. ...[The Opticks] would allow the reader to roam, with great Newton as his guide, through the major unresolved problems of science and even the relation of the whole world of nature to Him who had created it. ...in the Opticks Newton did not adopt the motto... —Hypotheses non fingo; I frame no hypotheses—but, so to speak, let himself go, allowing his imagination full reign and by far exceeding the bounds of experimental evidence.
I. Bernard Cohen, Preface to Opticks by Sir Isaac Newton (1952)

“Opticks was out of harmony with the ideas of 19th-century physics. …an exposition of the "wrong" (i. e., corpuscular) theory of light,—even though it also contained many of the basic principles of the "correct" (i. e., wave) theory. Not only had Newton erred in his choice… but also he apparently had found no insuperable difficulty in simultaneously embracing features of two opposing theories. …by adopting a combination of the two theories at once, he had violated one of the major canons of 19th-century physics… Today our point of view is influenced by the theory of photons and matter waves, or the… complementarity of Niels Bohr; and we may read with a new interest Newtons ideas on the interaction of light and matter or his explanation of the corpuscular and undulatory aspects of light.”

I. Bernard Cohen (1914–2003) American historian of science

I. Bernard Cohen, Preface to Opticks by Sir Isaac Newton (1952)

Stephen Hawking photo

“Einstein is the only figure in the physical sciences with a stature that can be compared with Newton. Newton is reported to have said "If I have seen further than other men, it is because I stood on the shoulders of giants." This remark is even more true of Einstein who stood on the shoulders of Newton. Both Newton and Einstein put forward a theory of mechanics and a theory of gravity but Einstein was able to base General Relativity on the mathematical theory of curved spaces that had been constructed by Riemann while Newton had to develop his own mathematical machinery. It is therefore appropriate to acclaim Newton as the greatest figure in mathematical physics and the Principia is his greatest achievement.”

Stephen Hawking (1942–2018) British theoretical physicist, cosmologist, and author

"Newton's Principia" in 300 Years of Gravitation. (1987) by S. W. Hawking and W. Israel, p. 4

“Isaac Newton deserves to be included in a series of companions to major philosophers even though he was not a philosopher in the sense in which Descartes, Locke, and Kant were philosophers. That is, Newton made no direct contributions to epistemology or metaphysics that would warrant his inclusion in the standard list of major philosophers of the seventeenth and eighteenth centuries – Descartes, Spinoza, Locke, Leibniz, Berkeley, Hume, and Kant – or even in a list of other significant philosophers of the era – Bacon, Hobbes, Arnauld, Malebranche, Wolff, and Reid. The contributions to knowledge that made Newton a dominant figure of the last millennium were to science, not to philosophy.”

I. Bernard Cohen (1914–2003) American historian of science

Source: The Cambridge Companion to Newton, 2002, p. 1

Ben Stein photo

“In today’s world, at least in America, an Einstein or a Newton or a Galileo would probably not be allowed to receive grants to study or to publish his research. They cannot even mention the possibility that–as Newton or Galileo believed–these laws were created by God or a higher being. They could get fired, lose tenure, have their grants cut off. This can happen. It has happened.”

Ben Stein (1944) actor, writer, commentator, lawyer, teacher, humorist

Ben Stein’s Introductory Blog, Expelled: No Intelligence Allowed, 21 August 2007, 2008-02-26 http://expelledthemovie.com/blog/2007/08/21/bens-blog/#more-4,

“Paul was a great theologian as well as a great saint and a heroic missionary, but we are not bound to imprison our minds in his theories. Newton was a great scientist, but it is no disparagement of Newton to realize that even schoolboys today know more than he did about atoms. Thought moves on in every field of inquiry.”

Leslie Weatherhead (1893–1976) English theologian

Source: The Christian Agnostic (1965), p.117

Joseph Priestley photo

“Contemporary with Vitellio and Peccam was… Roger Bacon, a man of almost universal genius, and who wrote on almost every branch of science. He frequently quotes Alhazen on the subject of optics, and seems to have carefully studied his writings, as well as those of other Arabians, which were the fountains of natural knowledge in those days, and which had been introduced into Europe by means of the Moors in Spain. Notwithstanding the pains this great man took with the subject of opticks, it does not appear that, with respect to theory, he made any considerable advance upon what Alhazen had done before him.”

Joseph Priestley (1733–1804) English theologian, chemist, educator, and political theorist

Period I To the Revival of Letters in Erope
The History and Present State of Discoveries Relating to Vision, Light, and Colours (1772)

“By contrast, Galileo, the other legendary scientific figure of the era, not only published the most compelling critique of Aristotelian scholasticism in his Dialogues on the Two Chief World Systems, but in the process turned the issue of the epistemic authority of theology versus the epistemic authority of empirical science into a hallmark of modern times. Although Newton clearly sympathized with Galileo, he wrote virtually nothing critical of the Aristotelian tradition in philosophy, and the immense effort he devoted to theology was aimed not at challenging its epistemic authority, but largely at putting it on a firmer footing. Newton made no direct contributions to philosophy of a similar magnitude. Indeed, from his extant writings alone Newton has more claim to being a major theologian than a major philosopher.”

I. Bernard Cohen (1914–2003) American historian of science

Source: The Cambridge Companion to Newton, 2002, p. 1

“In writing Newton's biography, I have attempted, in accordance with my understanding of biography as a literary form, to avoid composing an essay on Newtonian science. At the same time I have sought to make Newton the scientist the central character of my drama.”

Richard S. Westfall (1924–1996) American historian

Preface
Never at Rest (1980)

Michael Szenberg photo

“In contrast to the natural sciences, where Isaac Newton and Albert Einstein made their major contributions, most economics masterpieces were written when the authors were middle aged. Adam Smith, Karl Marx, John Maynard Keynes, and Milton Friedman come to mind. However, Paul started much earlier, in his 20s; and, even now, his new articles influence the fields of economics and finance.”

Michael Szenberg (1934) American economist

4.Paul Samuelson is Unique.
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