This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
“Sacrifice” is the surrender of a greater value for the sake of a lesser one or of a nonvalue. Thus, altruism gauges a man’s virtue by the degree to which he surrenders, renounces
or betrays his values (since help to a stranger or an enemy is regarded as more virtuous, less “selfish,” than help to those one loves). The rational principle of conduct is the exact oppos ite: always act in accordance with the hierarchy of your values, and never sacrifice a greater value to a lesser one.

This applies to all choices, including one’s actions toward ...
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