This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...hat ethics is the province of the irrational, that reason cannot guide man’s life, that his goals and values should be chosen by vote or by whim — that ethics has nothing to do with reality, with existence, with one’s practical actions and concerns — or that the goal of ethics is beyond the grave, that the dead need ethics, not the living.

Ethics is not a mystic f
antasy — nor a social convention — nor a dispensable, subjective luxury, to be switched or discarded in any emergency. Ethics is an objective, metaphysical necessity of man ’s survival —...
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