My morality is based on man's life as a standard of value. And since man's mind is his basic means of survival, I hold that if man wants to live on earth, and to live as a human being, he has to hold reason as an absolute. And which I mean, that he has to hold reason as his only guide to action and that he must live by the independent judgment of his own mind. That his highest moral purpose is the achievement of his own happiness. And that he must not force other people nor accept their right to force him, that each man must live as an end in himself and follow his rational self interest.
from: Interview with Mike Wallace (1959)