“It is necessary to learn geometry only so far as might enable a man to measure land for the purposes of buying and selling.”

Diogenes Laertius

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Socrates168

classical Greek Athenian philosopher -470–-399 BC

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“Nevertheless, it remains conceivable that the measure relations of space in the infinitely small are not in accordance with the assumptions of our geometry [Euclidean geometry], and, in fact, we should have to assume that they are not if, by doing so, we should ever be enabled to explain phenomena in a more simple way.”

Bernhard Riemann (1826–1866) German mathematician

Memoir (1854) Tr. William Kingdon Clifford, as quoted by A. D'Abro, The Evolution of Scientific Thought from Newton to Einstein https://archive.org/details/TheEvolutionOfScientificThought (1927) p. 55.

“The natural liberty of man, by entering into society, is abridged or restrained, so far only as is necessary for the great end of society, the best good of the whole.”

Samuel Adams (1722–1803) American statesman, Massachusetts governor, and political philosopher

The Rights of the Colonists (1772)
Context: The natural liberty of man, by entering into society, is abridged or restrained, so far only as is necessary for the great end of society, the best good of the whole. In the state of nature every man is, under God, judge and sole judge of his own rights and of the injuries done him. By entering into society he agrees to an arbiter or indifferent judge between him and his neighbors; but he no more renounces his original right than by taking a cause out of the ordinary course of law, and leaving the decision to referees or indifferent arbitrators. In the last case, he must pay the referees for time and trouble. He should also be willing to pay his just quota for the support of government, the law, and the constitution; the end of which is to furnish indifferent and impartial judges in all cases that may happen, whether civil, ecclesiastical, marine, or military.

“It is the system of great landed estates which invented and sustains the trafficking of whites and blacks who sell and buy men. … It is this system which in the colonies gives the blacks of our plantations only a blow with a whip and a morsel of bread.”

François-Noël Babeuf (1760–1797) French political agitator and journalist of the French Revolutionary period

C'est la grande propriété qui a inventé et soutient le trafic des blancs et des noirs qui vend et achète les hommes... C'est elle qui dans les colonies donne aux nègres de nos plantations plus de coup de fouet que de morceau de pain.
[in Gracchus Babeuf avec les Egaux, Jean-Marc Shiappa, Les éditions ouvrières, 1991, 19, 27082 2892-7]
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“A firm may be defined as an institution which buys things, transforms them in some way, and then sells them with the purpose of making a profit. The things a firm buys we shall call "inputs." The things it sells we shall call "outputs." The process whereby the things it buys are transformed into the things it sells we shall call the "process of production." In any process of buying to sell again a process of production is always involved…
A business, therefore, is a process whereby certain inputs, valued in dollars in some way, are transformed into outputs, also valued in dollars in some way.”

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“Many a man thinks he is buying pleasure when he is really selling himself a slave to it.”

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“Buying and selling is essentially antisocial.”

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Source: Looking Backward, 2000-1887 http://www.gutenberg.org/dirs/etext96/lkbak10.txt (1888), Ch. 9.

“The truth is that other systems of geometry are possible, yet after all, these other systems are not spaces but other methods of space measurements. There is one space only, though we may conceive of many different manifolds, which are contrivances or ideal constructions invented for the purpose of determining space.”

Paul Carus (1852–1919) American philosopher

Science, Vol. 18 (1903), p. 106, as reported in Memorabilia Mathematica; or, The Philomath's Quotation-Book https://archive.org/stream/memorabiliamathe00moriiala#page/81/mode/2up, (1914), by Robert Edouard Moritz, p. 352

“The purpose of time is to enable you to learn how to use time constructively. It is thus a teaching device and a means to an end. Time will cease when it is no longer useful in facilitating learning.”

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A Course in Miracles, (1976)

“It is necessary to learn geometry only so far as might enable a man to measure land for the purposes of buying and selling.”

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