This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...cepted the ethics of altruism; he believes that it is immoral to act for his self-interest. That is the principle directing his actions.
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Advocates of the “everyone is selfish”
doctrine do not deny that, under the pressure of the altruist ethics, men can knowingly act against their own long-range happiness. They merely assert that in some higher, undefmable sense such
men are still acting “selfishly.” A definition of “selfishness” that includes or permits the possibility of knowingly acting against one’s long- range happiness, is a contradiction in ...