Source: Spectrum: From Right to Left in the World of Ideas (2005), Ch 3. "Dreams of Central Europe, Timothy Garton Ash" (1999), p. 76
“If man has learned to see and know what really is, he will act in accordance with truth, Epistemology is in itself ethics, and ethics is epistemology.”
Source: One-Dimensional Man (1964), p. 125
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Herbert Marcuse 105
German philosopher, sociologist, and political theorist 1898–1979Related quotes

Source: Christianity and the Social Crisis (1907), Ch.1 The Historical Roots of Christianity the Hebrew Prophets, p. 7
Context: The prophets were the heralds of the fundamental truth that religion and ethics are inseparable, and that ethical conduct is the supreme and sufficient religious act. If that principle had been fully adopted in our religious life, it would have turned the full force of the religious impulse into the creation of right moral conduct and would have made the unchecked growth and accumulation of injustice impossible.

Diary of an Unknown (1988), On Invisibility
Context: Poetry is an ethic. By ethic I mean a secret code of behavior, a discipline constructed and conducted according to the capabilities of a man who rejects the falsifications of the categorical imperative.
This personal morality may appear to be immorality itself in the eyes of those who lie to themselves, or who live a life of confusion, in such a manner that, for them, a lie becomes the truth, and our truth becomes a lie...

Speech at the Louis Marshall Award Dinner of the Jewish Theological Seminary, Americana Hotel, New York City (11 November 1962)
1960s

Kulturphilosophie (1923), Vol. 2 : Civilization and Ethics
Context: I must interpret the life about me as I interpret the life that is my own. My life is full of meaning to me. The life around me must be full of significance to itself. If I am to expect others to respect my life, then I must respect the other life I see, however strange it may be to mine. And not only other human life, but all kinds of life: life above mine, if there be such life; life below mine, as I know it to exist. Ethics in our Western world has hitherto been largely limited to the relations of man to man. But that is a limited ethics. We need a boundless ethics which will include the animals also.
“Ethical obligation has to subordinate itself to the totalitarian nature of war.”
1947. Quoted in article "Ethics of Nazi doctors analyzed in telecast" by Joanna Arnold, 10/17/07

Contribution in Albert Einstein: Philosopher-Scientist, p. A. Schilpp, ed. (The Library of Living Philosophers, Evanston, IL (1949), p. 684). Quoted in Einstein's Philosophy of Science http://plato.stanford.edu/entries/einstein-philscience/
1940s