The Nazis in the days before they achieved power lived laborious lives, involving much sacrifice of ease and present pleasure in obedience to the belief in strenuousness and Nietzsche's maxim that one should make oneself hard. Even after they achieved power, the slogan 'guns rather than butter' still involved a sacrifice of the pleasures of sense for the mental pleasures of prospective victory - the very pleasures, in fact, with which Milton's Satan consoles himself while tortured by the fires of hell.
Source: Bertrand Russell: Ideas That Have Harmed Mankind，1946.
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