This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
...d in itself, which is his own life.

Value is that which one acts to gain and/or keep — virtue is the act by which one gains and/or keeps it. The three cardinal values of the Obje
ctivist ethics — the three values which, together, are the means to and the realization of one’s ultimate value, one’s own life — are: Reason, Purpose, Self-Esteem, with their three corr esponding virtues: Rationality, Productiveness, Pride.

Productive work is the central purpose of a rational man’s life, the central value that integrates and determines the hiera...
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