Man has a single basic choice: to think or not, and that is the gauge of his virtue. Moral perfection is an unbreached rationality-not the degree of your intelligence, but the full and relentless use of your mind, not the extent of your knowledge, but the acceptance of reason as an absolute.
Ayn RandThe moral is the chosen, not the forced; the understood, not the obeyed. The moral is the rational, and reason accepts no commandments.
Ayn Rand