Ayn Rand’s view of rationality is:
“Rationality is man’s basic virtue, the source of all his other 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.”
“The Objectivist Ethics,” The Virtue of Selfishness, 440.
Found through http://aynrandlexicon.com