This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...s dissociated from reality, is an unhealthy consciousness. (For a fuller discussion of this issue, see the chapter entitled “Objectivism and Psychology” in my book Who Is Ayn RancP. )
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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.
Anxiety and guilt, the antipodes of self-esteem and the insignia of mental illness, are the disintegrators of thought, the distorters of values and the paralyzers of action.