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In order to deal with reality successfully - to pursue and achieve the values which his life requires - man needs self-esteem; he needs to be confident of his efficacy and worth.

Ayn Rand (1964). “The Virtue of Selfishness”, p.33, Penguin
In order to deal with reality successfully - to pursue and achieve the values which his life requires - man needs self-esteem; he needs to be confident of his efficacy and worth.