„Knowledge isn’t power until it is applied.“

Last update June 10, 2021. History
Dale Carnegie photo
Dale Carnegie98
American writer and lecturer 1888 - 1955

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As cited by Drew Gilpin Faust, " Harvard Business School Centennial http://www.harvard.edu/president/speech/2008/harvard-business-school-centennial," at harvard.edu, October 14, 2008.
"The Failure of Business Leadership and the Responsibility of the Universities", 1933

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„How can people be anything but ignorant when knowledge isn’t saved, isn’t taught?“

—  Ursula K. Le Guin American writer 1929 - 2018

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„Knowledge is power; knowledge shared is power lost.“

—  Aleister Crowley poet, mountaineer, occultist 1875 - 1947

This has been attributed to Crowley on the internet, but without citation. No incidents of it in Crowley's works have as yet been located.
This was quoted as an "occult tradition" in Fundamentals of Experimental Psychology (1976) by Charles Lawrence Sheridan, p. 17, but without any reference to Crowley.
Disputed
Variant: Knowledge is power and knowledge shared is power lost.

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„Typography as the first mechanization of a handicraft is itself the perfect instance not of a new knowledge, but of applied knowledge.“

—  Marshall McLuhan Canadian educator, philosopher, and scholar-- a professor of English literature, a literary critic, and a communicatio… 1911 - 1980

Source: 1960s, The Gutenberg Galaxy (1962), p. 171

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„Rabelais offers a vision of the future of print culture as a consumer's paradise of applied knowledge.“

—  Marshall McLuhan Canadian educator, philosopher, and scholar-- a professor of English literature, a literary critic, and a communicatio… 1911 - 1980

Source: 1960s, The Gutenberg Galaxy (1962), p. 167

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„The levelling of inflexion and of wordplay became part of the program of applied knowledge in the seventeenth century.“

—  Marshall McLuhan Canadian educator, philosopher, and scholar-- a professor of English literature, a literary critic, and a communicatio… 1911 - 1980

Source: 1960s, The Gutenberg Galaxy (1962), p. 265

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„Science discovers these laws of power, motion and transformation; industry applies them to raw matter which the earth yields us in abundance, but which becomes valuable only by knowledge.“

—  Albert, Prince Consort husband of Queen Victoria 1819 - 1861

Inaugural Address of the Great Exhibition of the Works of Industry of All Nations, London (1851).
Context: Nobody who has paid any attention to the peculiar features of our present era will doubt for a moment that we are living at a period of most wonderful transition which tends rapidly to the accomplishment that great end to which, indeed, all history points—the realization of the unity of mankind.... The distances which separated the different nations and parts of the globe are rapidly vanishing before the achievements of modern invention, and we can traverse them with incredible ease; the languages of all nations are known, and their acquirement placed within the reach of everybody; thought is communicated with the rapidity and even by the power of lightning... The knowledge acquired becomes at once the property of all of the community at large... no sooner is a discovery or invention made, than it is already improved upon and surpassed by competing efforts: the products of all quarters of the globe are placed at our disposal, and we have only to choose which is the best and the cheapest for our purposes, and the powers of production are entrusted to the stimulus of competition and capital.... Science discovers these laws of power, motion and transformation; industry applies them to raw matter which the earth yields us in abundance, but which becomes valuable only by knowledge.

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Thomas Hobbes photo

„Knowledge is power.“

—  Thomas Hobbes, book Leviathan

This is the sentence that dug the grave of philosophy in the nineteenth century. … This sentence brings to an end the tradition of a knowledge that, as its name indicates, was an erotic theory—the love of truth and the truth through love (Liebeswahrheit). … Those who utter the sentence reveal the truth. However, with the utterance they want to achieve more than truth: They want to intervene in the game of power.
Source: Kritik der zynischen Vernunft [Critique of Cynical Reason] (1983), p. xxvii
Source: Leviathan

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„There is no knowledge that is not power.“

—  Ralph Waldo Emerson American philosopher, essayist, and poet 1803 - 1882

Old Age
1870s, Society and Solitude (1870)

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„Power' is an ominous and sinister word in all these tales, except as applied to the gods.“

—  John Ronald Reuel Tolkien British philologist and author, creator of classic fantasy works 1892 - 1973

No. 131: letter to Milton Waldman (c. 1951)
The Letters of J. R. R. Tolkien (1981)

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„Knowledge itself is power.“

—  Francis Bacon English philosopher, statesman, scientist, jurist, and author 1561 - 1626

Meditationes Sacræ [Sacred Meditations] (1597) "De Hæresibus" [Of Heresies]
Variants:
Scientia Ipsa Potentia Est.
Scientia potentia est.
Knowledge is power.
Scientia potestas est.
Scientia est potentia.
Original: (la) Nam et ipsa scientia potestas est.
Source: Meditations Sacrae and Human Philosophy Meditations Sacrae and Human Philosophy

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„[N]o law, written or unwritten, can be understood without a full knowledge of the facts out of which it arises, and to which it is to be applied.“

—  Louis Brandeis American Supreme Court Justice 1856 - 1941

The Living Law, 10 Illinois Law Review 461, 467 (1915-16).
Extra-judicial writings

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