“If there is anything in the world that can really be called a man’s property, it is surely that which is the result of his mental activity.”
Unverified attribution noted in Respectfully Quoted: A Dictionary of Quotations (1993), ed. Suzy Platt, Library of Congress, p. 227
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Arthur Schopenhauer 261
German philosopher 1788–1860Related quotes
Source: Steps to an Ecology of Mind (1972), p. 336

Source: The Doctrine of the Mean

Ungar, v. Sugg (1892) 9 RPC 113, at 116

"The Foundations of Historical Materialism," Studies in Critical Philosophy (1972), p. 32

Source: Social Justice in Islam (1953), p. 132

The Rainbow of Desire (1995)
Context: Theatre has nothing to do with buildings or other physical constructions. Theatre — or theatricality — is the capacity, this human property which allows man to observe himself in action, in activity. The self-knowledge thus acquired allows him to be the subject (the one who observes) of another subject (the one who acts). It allows him to imagine variations of his action, to study alternatives. Man can see himself in the act of seeing, in the act of acting, in the act of feeling, the act of thinking. Feel himself feeling, think himself thinking.

Vol. I, Ch. 13: "Machinery and Big Industry".
(Buch I) (1867)