This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...’s choices in the achievement of a concrete, specific purpose. “That which is required for the survival of man qua man” is an abstract principle that applies to every individual man. The t ask of applying this principle to a concrete, specific purpose — the purpose of living a life proper to a rational being — belongs to every individual man, and the life he has to live is his own.

Man must choose his actions, values and goals by the standard of that which is proper to man — in order to achieve, maintain, fulfill and enjoy that ultimate value, that en...
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