This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...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.
read full book
Productive work is the central purpose of a rational man’s life, the central value that integrates and determines the hiera
rchy of all his other values. Reason is the source, the precondition of his productive work — pride is the result.
Rationality is man’s basic virtue, the source of all his othe...