“To every action there is always opposed an equal reaction; or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.”

Laws of Motion, III
Philosophiæ Naturalis Principia Mathematica (1687)

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British physicist and mathematician and founder of modern c… 1643–1727

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“To every action there is always opposed an equal reaction”

Laws of Motion, III
Philosophiae Naturalis Principia Mathematica (1687)
Context: To every action there is always opposed an equal reaction; or, the mutual actions of two bodies upon each other are always equal, and directed to contrary parts.

John Avlon photo

“Politics follows the lines of physics: every action creates an equal and opposite reaction.”

John Avlon (1973) American journalist

Source: The Rise of Political Extremism and the Decline of Decency, April 8, 2010, US News http://www.usnews.com/opinion/articles/2010/04/08/the-rise-of-political-extremism-and-the-decline-of-decency,
Context: It's part of a continuum. Whenever I interview someone at a protest carrying an "Obama is Hitler" sign, and I go up to ask to talk to them to see what they're thinking, invariably they've said, "Well, they started it. They called our president 'Hitler' and nobody complained." And the reality is that politics follows the lines of physics. Every action creates an equal and opposite reaction. And the extremes incite each other. What's especially frustrating to me is that we're talking about a relatively small group of people. There's a huge, untapped center in America that is frustrated with the agitated status quo. And, I think there's a real need to stand up.

Gary Zukav photo

“For every action there is an equal and opposite reaction. You receive from the world what you give to the world.”

Gary Zukav (1942) American writer and revivalist

Source: The Seat of the Soul

Chinmayananda Saraswati photo

“Sin is never in action, it is always in reaction.”

Chinmayananda Saraswati (1916–1993) Indian spiritual teacher

Quotations from Gurudev’s teachings, Chinmya Mission Chicago

Isaac Newton photo
Gertrude Stein photo
Antoinette Brown Blackwell photo

“The antagonism is only that of action and reaction, which are but two phases of the same process—opposing phases which exist everywhere, and which must exist, or action itself cease, and death reign universally.”

Antoinette Brown Blackwell (1825–1921) American minister

September 1874, Popular Science Monthly Vol. 5, Article: The Alleged Antagonism Between Growth and Reproduction , p. 607
The Alleged Antagonism Between Growth and Reproduction (1874)

“If two right lines cut one another, they will form the angles at the vertex equal….
This… is what the the present theorem evinces, that when two right lines mutually cut each other, the vertical angles are equal. And it was first invented according to Eudemus by Thales…”

Proclus (412–485) Greek philosopher

Proposition XV. Thereom VIII.
The Philosophical and Mathematical Commentaries of Proclus on the First Book of Euclid's Elements Vol. 2 (1789)

John Quincy Adams photo

“The duties of man consist in alternate action and meditation, mutually aiding and relieving each other; and both, directed with undeviating aim, to the progressive improvement of himself and his fellow creatures.”

John Quincy Adams (1767–1848) American politician, 6th president of the United States (in office from 1825 to 1829)

"Society and Civilization" in the American Review (July 1845)
Context: The duties of man consist in alternate action and meditation, mutually aiding and relieving each other; and both, directed with undeviating aim, to the progressive improvement of himself and his fellow creatures. Heaven has given him in charge, to promote the happiness and well-being of himself, his wife, his children, his kindred, his neighbors, his fellow citizens, his country, and his kind; and the great problem of legislation is, so to organize the civil government of a community, that this gradation of duties, may be made to harmonize in all its parts — that in the operation of human institutions upon social action, self-love and social may be made the same.

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