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

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Popular quotes

“He shook his head in exasperation. “Are you sure you’re not a Succubus? You seem really obsessed with the sin of lust.”

“It’s a good sin. I like gluttony an awful lot, too. Sloth has its moments, but I just don’t understand acedia at all. I mean, what the f**k is that anyway? Oh, and greed is good, to quote Gordon Gekko. Anger, envy and pride,” I ticked them off on my fingers. “I don’t often have much use for them. It’s a shortcoming that I’m hoping to correct in the next millennium or two. I’m not very old; I can’t be expected to have mastered them all yet.”

“I think you’ve worked too hard on some of those,” he said dryly. “Maybe you should switch over to virtues instead. Give yourself a much needed break.”

Virtues? Yeah, right.

“Virtues are too difficult,” I told him, shaking my head. “Look how old you are and you’ve hardly made a dent in them. I’ll admit, you seem to have zeal nailed, as well as faith and temperance. Self control? I’ve got my doubts based on your recent actions. I’m not seeing the kindness, love or generosity, either. That humility thing seems to be pretty far beyond your reach, too. Really, really far. I’m sorry to tell you this, but from what I can see, the sin of pride is a major component of your character. Dude, you’re f**king old. You should have these things pretty well ticked off your shopping list by now. I’m seriously disappointed. Seriously.”
― Debra Dunbar, quote from A Demon Bound

“I would like to understand things better, but I don’t want to understand them perfectly.”
― Douglas R. Hofstadter, quote from Metamagical Themas: Questing for the Essence of Mind and Pattern

“if I've learned one thing over the years, it's that when it comes down to raw emotion against reason, emotion wins.”
― David Weber, quote from The Honor of the Queen

“It was the people, the interconnection, everyone relying on everyone else, the closeness. The villages are all dying now, small-town America is dying, and the only place where the same feeling exists now is here, in the city, millions of people all breathing the same air. This, here, now, is more utopia than utopia, more than your pretty little house out in the middle of the forest with only woodchucks for neighbors. Can't you see? All of we kids are here, almost all of the kids from Arcadia, are here in the city. We've gone urban because we're all looking for what we lost. This is the only place that approximates it. The closeness. The connection.”
― Lauren Groff, quote from Arcadia

“(...) era tão diversa de si mesma, ora isto, ora aquilo, que os dias iam passando sem acordo fixo, nem desengano perpétuo.”
― Machado de Assis, quote from Quincas Borba

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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.

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