Source: The Best of All Possible Worlds (2006), Chapter 6, Pandora's Box, p. 122.
“The scientist tries to understand the origin of our solar system, the structure of the universe and the laws governing the atom. He has discovered X rays, the radioactive substances, and he has built cyclotrons. He has foreseen the existence of electromagnetic and electronic waves. Out of his thought has grown the technique of our century. But not until today has he begun to notice that the earth on which he moves is covered with sweat and with blood and that in the world in which he lives "the son of man has nowhere to lay his head."”
Quest: An Autobiography [1941] (second edition, 1980), Book III, "Search and Research", p. 338
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Leopold Infeld 2
Polish physicist 1898–1968Related quotes
Source: The Meaning of God in Human Experience (1912), Ch. XVI : The Original Sources of the Knowledge of God, p. 237.
Source: Treason of the Intellectuals (1927), pp. 158–159

Responding to President George W. Bush remarks on Iran, November 21, 2007 https://www.reuters.com/article/us-venezuela-chavez-bush/chavez-says-bush-belongs-in-asylum-for-ww3-comment-idUSL2062324220071120
2007

Source: The Doctrine of the Mean

B 12
Variant translation: Everyone has a moral backside, which he does not show except in case of need and which he covers as long as possible with the breeches of respectability.
As quoted in Der Witz und seine Beziehung zum Unbewussten [Jokes and Their Relation to the Unconscious] (1905) by Sigmund Freud, as translated by James Strachey (1960), p. 100
Aphorisms (1765-1799), Notebook B (1768-1771)

Don Quixote de la Mancha (1605–1615), Part 2: Chapter LV
Source: Individuals (1959), pp. xiv-xv.
Context: Metaphysics has a long and distinguished history, and it is consequently unlikely that there are any new truths to be discovered in descriptive metaphysics. But this does not mean that the task of descriptive metaphysics has been, or can be, done once for all. It has constantly to be done over again. If there are no new truths to be discovered, there are old truths to be rediscovered. For though the central subject-matter of descriptive metaphysics does not change, the critical and analytical idiom of philosophy changes constantly. Permanent relationships are described in an impermanent idiom, which reflects both the age’s climate of thought and the individual philosopher’s personal style of thinking. No philosopher understands his predecessors until he has re-thought their thought in his own contemporary terms; and it is characteristic of the very greatest philosophers, like Kant and Aristotle, that they, more than any others, repay this effort of re-thinking