Source: Lumina and New Lumina (1969), p. 15
“No more fiction for us: we calculate; but that we may calculate, we had to make fiction first.”
Sec. 624, as translated by Tobias Dantzig in Number, the Language of Science. Fourth edition, New York: Doubleday 1954, p 141. See discussion of this entry for details.
The Will to Power (1888)
A Conversation with Ward Cunningham (2003), Working the Program
Babbage in November 1839, recalling events in 1821; quoted in Harry Wilmot Buxton and Anthony Hyman (1988), Memoir of the Life and Labours of the Late Charles Babbage. "Computers" here refers to people calculating by hand.
Source: The Art of War, Chapter I · Detail Assessment and Planning
"The Forty Rules of Love" (2010) by Elif Şafak (The book is about Rumi, but the quote is the author's own words)
Misattributed
“… we can afford many mistakes in the search. The main thing is to make as fast as possible.”
As quoted by Charles W. Misner, Kip S. Thorne, and Wojciech H. Zurek. "John Wheeler, relativity, and quantum information." https://authors.library.caltech.edu/15184/1/Misner2009p1638Phys_Today.pdf Physics Today 62, no. 4 (April 2009): 40–46 (quote from p. 44) [10.1063/1.3120895]
Theoria motus corporum coelestium in sectionibus conicis solem ambientum (1809) Tr. Charles Henry Davis as Theory of the Motion of the Heavenly Bodies moving about the Sun in Conic Sections http://books.google.com/books?id=cspWAAAAMAAJ& (1857)
Context: The principle that the sum of the squares of the differences between the observed and computed quantities must be a minimum may, in the following manner, be considered independently of the calculus of probabilities. When the number of unknown quantities is equal to the number of the observed quantities depending on them, the former may be so determined as exactly to satisfy the latter. But when the number of the former is less than that of the latter, an absolutely exact agreement cannot be obtained, unless the observations possess absolute accuracy. In this case care must be taken to establish the best possible agreement, or to diminish as far as practicable the differences. This idea, however, from its nature, involves something vague. For, although a system of values for the unknown quantities which makes all the differences respectively less than another system, is without doubt to be preferred to the latter, still the choice between two systems, one of which presents a better agreement in some observations, the other in others, is left in a measure to our judgment, and innumerable different principles can be proposed by which the former condition is satisfied. Denoting the differences between observation and calculation by A, A’, A’’, etc., the first condition will be satisfied not only if AA + A’ A’ + A’’ A’’ + etc., is a minimum (which is our principle) but also if A4 + A’4 + A’’4 + etc., or A6 + A’6 + A’’6 + etc., or in general, if the sum of any of the powers with an even exponent becomes a minimum. But of all these principles ours is the most simple; by the others we should be led into the most complicated calculations.
“When we own up our mistakes some people interpret it as if we are wrong. They too commit mistakes.”
Quoted in Quotations by 60 Greatest Indians, Dhirubhai Ambani Institute of Information and Communication Technology http://resourcecentre.daiict.ac.in/eresources/iresources/quotations.html,
