This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...es or random whims, but must be discovered and achieved by the guidance of rational principles. This is why the Objectivist ethics is a morality of rational self-interest — or of rational self ishness.

Since selfishness is “concern with one’s own interests,” the Objectivist ethics uses that concept in its exact and purest sense. It is not a concept that one can sur
render to man’s enemies, nor to the unthinking misconceptions, distortions, prejudices and fears of the ignorant and the irrational. The attack on “selfishness” is an attack on man’s sel...
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