This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
... and the validation of a rational morality, see my lecture on “The Objectivist Ethics” which follows. The reasons why man needs a moral code will tell you that the purpose of morality is to
define man’s proper values and interests, that concern with his own interests is the essence of a moral existence, and that man must be the beneficiary of his own moral actions.
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Since all values have to be gained and/or kept by men’s actions, any breach between actor and beneficiary necessitates an injustice: the sacrifice of some men to others, of the actors to the n...