This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
... the person who acts.

To be selfish is to be motivated by concern for one’s self-interest. This requires that one consider what constitutes one’s self-interest and how to achie
ve it — what values and goals to pursue, what principles and policies to adopt. If a man were not concerned with this question, he could not be said objectively to be concerned with or to desi re his self-interest; one cannot be concerned with or desire that of which one has no knowledge.

Selfishness entails: (a) a hierarchy of values set by the standard of one’s self-...
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