This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...y — the reality knowable to reason. And if man does not choose to perceive it, there is nothing else for him to perceive; if it is not of this world that he is conscious, then he is not consci
ous at all.
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The sole result of the mystic projection of “another” reality, is that it incapacitates man psychologically for this one. It was not by contemplating the transcende
ntal, the ineffable, the undefmable — it was not by contemplating the nonexistent — that man lifted himself from the cave and transformed the material world to make a human existence possibl...