This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
“Ethics is not a mystic fantasy — nor a social convention — nor a dispensable, subjective luxury. ... Ethics is an objective necessity of man’s survival — not by the grace of the super
natural nor of your neighbors nor of your whims, but by the grace of reality and the nature of life.”
read full book
“The Objectivist ethics proudly advocates and upholds rational selfishness...