This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...give rise to such an issue as selfishness versus self-sacrifice, or egoism versus altruism, and what the concept of “selfishness” means and entails.
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The issue of selfishness ve
rsus self-sacrifice arises in an ethical context. Ethics is a code of values to guide man’s choices and actions — the choices and actions that determine the purpose and course of his life. I
n choosing his actions and goals, man faces constant alternatives. In order to choose, he requires a standard of value — a purpose which his actions are to serve or at which they are to aim. �...