This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...ty, one’s conviction of fundamental efficacy and worthiness. It reflects the certainty that, in essence and in principle, one is right for reality. Self-esteem is a metaphysical estimate.
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It is this psychological state that traditional morality makes impossible, to the extent that a man accepts it.
Neither mysticism nor the creed of self-sacrifice is compa
tible with mental health or self-esteem. These doctrines are destructive existentially and psychologically.
(1) The maintenance of his life and the achievement of self-esteem requi...