This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...h the rest of one’s concepts and understanding of reality — is to sabotage the integrative function of consciousness, to undercut the rest of one’s convictions and kill one’s capacity to
be certain of anything. This is the meaning of John Galt’s statement in Atlas Shrugged that “the alleged shortcut to knowledge, which is faith, is only a short circuit destroying the mind.�
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There is no greater self-delusion than to imagine that one can render unto reason that which is reason’s and unto faith that which is faith’s. Faith cannot be circumscribed ...