This is a quote from the book "The Virtue Of Selfishness" by Ayn Rand
...rchy of all his other values. Reason is the source, the precondition of his productive work — pride is the result.
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Rationality is man’s basic virtue, the source of all his othe
r virtues. Man’s basic vice, the source of all his evils, is the act of unfocusing his mind, the suspension of his consciousness, which is not blindness, but the refusal to see, not ignorance,
but the refusal to know. Irrationality is the rejection of man’s means of survival and, therefore, a commitment to a course of blind destruction; that which is anti-mind, is anti-life.