This is a quote from the book "The ​Virtue Of Selfishness" by Ayn Rand
... 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.� ��

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
or delimited; to surrender one’s consciousness by an inch, is to surrender one’s consciousness in total. Either reason is an absolute to a mind or it is not — and if it is not, there is no...
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