Moreover, in a system of two bodies mutually acting upon each other, since the differences between their centres and the common centre of gravity of both are reciprocally as the bodies, the relative motions of those bodies, whether of approaching to or of receding from that centre, will be equal junong themselves. Therefore since the changes which happen to motions are equal and directed to contrary parts.

Actioni contrarium semper et aequalem esse reactionem: sive corporum duorum actiones in se mutuo semper esse aequales et in partes contrarias dirigi.

Isaac Newton

Principia

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Topic

Cause and effect Laws of physics Physics Science

Author

Isaac Newton

Source

Principia

Genre

Scientific literature

Language

Latin

Time

1687 1680s 17th century

Era

Age of Enlightenment

Occupation

Mathematician Physicist Scientist

From

United Kingdom Europe

Authentication Score 3

Original Citation

Newton, Isaac. "Axiomata sive Leges Motus: [Axioms, or Laws of Motion]." Philosophiae Naturalis Principia Mathematica [The Mathematical Principles of Natural Philosophy], vol. 1. London: Josephi Streater, 1687, law 3.

Current Citation

Newton, Isaac. "Axioms, or the Laws of Motion." The Principia, translated by Andrew Motte. Prometheus, 1995, law 3.

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Related Quotes

Below are one or more quotes that share at least one tag with the quote at the top of the page

Another quote by Isaac Newton

Every body perseveres in its state of rest, or of uniform motion in a right line, unless it is compelled to change that state by forces impressed thereon.

Isaac Newton

Principia

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Topic
Newton's laws of motion Laws of physics

Author

Isaac Newton
Source
Principia
Genre
Scientific literature
Language
Latin
Time
1687 1680s 17th century
Authentication Score 3
Original Citation

Newton, Isaac. "Axiomata sive Leges Motus: [Axioms, or Laws of Motion]." Philosophiae Naturalis Principia Mathematica [The Mathematical Principles of Natural Philosophy], vol. 1. London: Josephi Streater, 1687, law 1.

Current Citation

Newton, Isaac. "Axioms, or the Laws of Motion." The Principia, translated by Andrew Motte. Prometheus, 1995, law 1.

Another quote from the 1680s

For who can be secure of private right,
If sovereign sway may be dissolved by might?
Nor is the people's judgement always true:
The most may err as grossly as the few.

John Dryden

Absalom and Achitophel

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Topic
The masses Rule of law Democracy

Author

John Dryden
Source
Absalom and Achitophel
Medium
Poem
Genre
Satire
Language
English
Time
1681 1680s 17th century
Authentication Score 3
Original Citation

Dryden, John. Absalom and Achitophel. London: Jacob Tonson, 1681, pt. 1, I. 779.

Current Citation

Dryden, John. "Absalom and Achitophel." John Dryden Selected Poems. Penguin Classics, 2002, pt. 1, I. 779.

Another quote from Age of Enlightenment

God is, or He is not. But to which side shall we incline? Reason can decide nothing here. There is an infinite chaos which separates us. A game is being played at the extremity of this infinite distance where heads or tails will turn up. What will you wager?... If you win, you win everything; if you lose, you lose nothing. Wager, then, without hesitation that He is.

Blaise Pascal

Pensées

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Topic
Existence of God God Probability

Author

Blaise Pascal
Source
Pensées
Medium
Epigram
Genre
Philosophical literature
Language
French
Time
1662 1660s 17th century
Era
Age of Enlightenment
Authentication Score 2
Original Citation

Pascal, Blaise. Pensées [Thoughts]. Paris: Chez G. Desprez, 1670, no. 229.

Current Citation

Pascal, Blaise. "Pensées." Pensées and Other Writings, edited by Anthony Levi, translated by Honor Levi. Oxford University Press, 2008, no. 229.

Another quote originally in Latin

A people was a multitude defined by the common objects of their love.

St. Augustine

City of God

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Topic
Nation Community

Author

St. Augustine
Source
City of God
Genre
Philosophical literature Religious literature
Language
Latin
Time
426 420s 5th century
Era
Classical antiquity
Authentication Score 0
Original Citation

Augustine of Hippo. De civitate Dei contra paganos [On the City of God Against the Pagans]. c. 426, bk. 19, sect. 24.

Current Citation

Augustine of Hippo. City of God, translated by Henry Bettenson. Penguin Classics, 2004, bk. 19, sect. 24.