This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...interest, and (b) the refusal to sacrifice a higher value to a lower one or to a nonvalue.

A genuinely selfish man knows that only reason can determine what is, in fact, to his sel
f-interest, that to pursue contradictions or attempt to act in defiance of the facts of reality is self-destructive — and self-destruction is not to his self-interest. “To think, is to man� �s self-interest; to suspend his consciousness, is not. To choose his goals in the full context of his knowledge, his values and his life, is to man’s self-interest; to act on the impulse of t...
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