Quotes from The Principia: Mathematical Principles of Natural Philosophy

“This most beautiful system [The Universe] could only proceed from the dominion of an intelligent and powerful Being.”
― Isaac Newton, quote from The Principia: Mathematical Principles of Natural Philosophy

“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 from The Principia: Mathematical Principles of Natural Philosophy

“Resistance is usually ascribed to bodies at rest, and impulse to those in motion; but motion and rest, as commonly conceived, are only relatively distinguished; nor are those bodies always truly at rest, which commonly are taken to be so.”
― Isaac Newton, quote from The Principia: Mathematical Principles of Natural Philosophy

“This most beautiful system of the sun, planets, and comets, could only proceed from the counsel and dominion of an intelligent and powerful Being. And if the fixed stars are the centers of other like systems, these, being formed by the like wise counsel, must be all subject to the dominion of One.”
― Isaac Newton, quote from The Principia: Mathematical Principles of Natural Philosophy

“the one as much as it advances that of the other. If a body impinge upon another, and by its force change the motion of the other, that body also (because of the equality of the mutual pressure) will undergo an equal change, in its own motion, towards the contrary part.”
― Isaac Newton, quote from The Principia: Mathematical Principles of Natural Philosophy

“Hypotheses non fingo (Latin for "I feign no hypotheses", "I frame no hypotheses", or "I contrive no hypotheses")”
― Isaac Newton, quote from The Principia: Mathematical Principles of Natural Philosophy

About the author

Popular quotes

“Whatever may have been said of the satiety of pleasure and of the disgust which usually follows passion, any man who has anything of a heart and who is not wretchedly and hopelessly blasé feels his love increased by his happiness, and very often the best way to retain a lover ready to leave is to give one's self up to him without reserve.”
― Théophile Gautier, quote from Mademoiselle de Maupin

“What makes the desert beautiful,' said the little prince, 'is that somewhere it hides a well...”
― Antoine de Saint-Exupéry, quote from Der kleine Prinz

“Finally, people have to actually purchase it. It doesn’t matter how good a product is if, in the end, nobody uses it.”
― Donald A. Norman, quote from Design of Everyday Things: Revised and Expanded Edition (Revised)

“So I’m standing in a tree thirty feet above the pond with my three friends and my friend Pat says, “Dude, jump!” And I look down at the water, which is so far away, and I say, “That doesn’t seem like a good plan.” And they said, “Dude, we already jumped, it’s no biggie. What’s the worst thing that could happen? It’s only watah” (that’s “water” with a Boston accent), which is really flawed logic, that watah logic. I learn later that many bad things historically have happened in water. Shark attacks. Drowning. Bad sex. But my friend Nick makes an argument that in Massachusetts is irrefutable. He’s like, “Do it.” So I do.”
― quote from Sleepwalk With Me and Other Painfully True Stories

“This world,' she said. 'Do you really like it?'
What a question! Farid never asked himself such things. He was glad to be with Dustfinger again and didn't mind where that was.
It's a cruel world, don't you think?' Meggie went on. 'Mo often told me I forget how cruel it is too easily.'
With his burned fingers, Farid stroke her fair hair. It shone even in the dark. 'They're all cruel,' he said. 'The world I come from, the world you come from, and this one, too. Maybe the people don't see the cruelty in your world right away, it's better hidden, but it's there all the same.”
― Cornelia Funke, quote from Sangre de tinta

Interesting books

About BookQuoters

BookQuoters is a community of passionate readers who enjoy sharing the most meaningful, memorable and interesting quotes from great books. As the world communicates more and more via texts, memes and sound bytes, short but profound quotes from books have become more relevant and important. For some of us a quote becomes a mantra, a goal or a philosophy by which we live. For all of us, quotes are a great way to remember a book and to carry with us the author’s best ideas.

We thoughtfully gather quotes from our favorite books, both classic and current, and choose the ones that are most thought-provoking. Each quote represents a book that is interesting, well written and has potential to enhance the reader’s life. We also accept submissions from our visitors and will select the quotes we feel are most appealing to the BookQuoters community.

Founded in 2023, BookQuoters has quickly become a large and vibrant community of people who share an affinity for books. Books are seen by some as a throwback to a previous world; conversely, gleaning the main ideas of a book via a quote or a quick summary is typical of the Information Age but is a habit disdained by some diehard readers. We feel that we have the best of both worlds at BookQuoters; we read books cover-to-cover but offer you some of the highlights. We hope you’ll join us.