Martí : Thoughts/Pensamientos (1994)
Context: Happiness exists on earth, and it is won through prudent exercise of reason, knowledge of the harmony of the universe, and constant practice of generosity. He who seeks it elsewhere will not find it for, having drunk from all the glasses of life, he will find satisfaction only in those.
“That which exercises reason is more excellent than that which does not exercise reason; there is nothing more excellent than the universe, therefore the universe exercises reason.”
As quoted in De Natura Deorum by Cicero, ii. 8.; iii. 9.
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Zeno of Citium 9
ancient Greek philosopher -334–-263 BCRelated quotes
Source: The Bhagavadgītā (1973), p. 123–24. (46.)
“Reason is intelligence taking exercise; imagination is intelligence with an erection.”
Unpublished notebook from 1845-50. Published in Seebacher (ed.), Oeuvres Complètes, vol. 10, p. 158 (Laffont, 1989). English translation from Robb, Victor Hugo p. 249 (Norton, 1997).
“It is only by the exercise of reason that man can discover God.”
1790s, The Age of Reason, Part I (1794)
“For what else are all these things, except exercises for the reason”
X, 31
Meditations (c. 121–180 AD), Book X
Context: What matter and opportunity [for thy activity] art thou avoiding? For what else are all these things, except exercises for the reason, when it has viewed carefully and by examination into their nature the things which happen in life? Persevere then until thou shalt have made these things thy own, as the stomach which is strengthened makes all things its own, as the blazing fire makes flame and brightness out of everything that is thrown into it.
Letter to Simón Bolívar (27 September 1829). Quoted in The Life of Major-General William Henry Harrison: Comprising a Brief Account of His Important Civil and Military Services (Philadelphia, PA: Grigg & Elliot, 1840)
The Limits of Science. (New York: Harper & Row, 1984) p. 98.
1980s
"Systems of Logic Based on Ordinals," section 11: The purpose of ordinal logics (1938), published in Proceedings of the London Mathematical Society, series 2, vol. 45 (1939)
In a footnote to the first sentence, Turing added: "We are leaving out of account that most important faculty which distinguishes topics of interest from others; in fact, we are regarding the function of the mathematician as simply to determine the truth or falsity of propositions."
Context: Mathematical reasoning may be regarded rather schematically as the exercise of a combination of two facilities, which we may call intuition and ingenuity. The activity of the intuition consists in making spontaneous judgements which are not the result of conscious trains of reasoning... The exercise of ingenuity in mathematics consists in aiding the intuition through suitable arrangements of propositions, and perhaps geometrical figures or drawings.