The Mathematical Principles of Natural Philosophy, Book III (tr. Andrew Motte, 1729; 1846 edition)

Isaac Newton · c. 1713–1726

Isaac Newton did not write this page.

Every claim below was made in this book, quoted word for word and numbered in the order the piece makes them, so you can read it there rather than take our word for it. The book prints chapter headings its extracted text does not preserve, so the claims below are in the book's order but not grouped. The sentence above each quote is our reading of the claim, not their wording. Each quote was checked against a stored copy of the page at build time; where the two differ, the quote is the fact.

Our reading
The system of sun, planets and comets could only come from an intelligent and powerful Being

Their wordsThis most beautiful system of the sun, planets, and comets, could only proceed from the counsel and dominion of an intelligent and powerful Being.
Our reading
We know the attributes of things, never their real substance

Their wordsWe have ideas of his attributes, but what the real substance of any thing is we know not.
Our reading
I frame no hypotheses about the cause of gravity: whatever is not deduced from the phenomena is a hypothesis

Their wordsBut hitherto I have not been able to discover the cause of those properties of gravity from phænomena, and I frame no hypotheses; for whatever is not deduced from the phænomena is to be called an hypothesis
Our reading
It is enough that gravity really exists, acts by the laws explained, and accounts for the motions of the heavens and the sea

Their wordsAnd to us it is enough that gravity does really exist, and act according to the laws which we have explained, and abundantly serves to account for all the motions of the celestial bodies, and of our sea.

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