This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...ite: always act in accordance with the hierarchy of your values, and never sacrifice a greater value to a lesser one.
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This applies to all choices, including one’s actions toward
other men. It requires that one possess a defined hierarchy of rational values (values chosen and validated by a rational standard). Without such a hierarchy, neither rational conduct nor consid
ered value judgments nor moral choices are possible.
Love and friendship are profoundly personal, selfish values: love is an expression and assertion of self-esteem, a response to ...