This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...led a rational being, but rationality is a matter of choice — and the alternative his nature offers him is: rational being or suicidal animal. Man has to be man — by choice; he has to hold h is life as a value — by choice; he has to leam to sustain it — by choice; he has to discover the values it requires and practice his virtues — by choice. A code of values accepted by choic e is a code of morality.”

The standard of value of the Objectivist ethics — the standard by which one judges what is good or evil — is man ’s life, or: that which is requir...
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