The Reality of the Law

This is a short chapter in which Lewis broadens this idea of the moral law. The distinction between the moral law and that of laws of science and mathematics is a vast one. The laws of science tell us of what things do under set conditions. The Moral Law tells us that which we "Ought" to do. Let us not jump past this, because this is what made the fall of man possible. We have in us both believers and nonbelievers an inner voice that tells us what we should do. Sometimes we listen and other times we feel that it is not in our best interest so we tune it out or we say that we do not because it is telling us what we do not wish to hear. Only with free will, can love be possible. Of course this also enables us to cause great pain as well.
Many people will write off this inner voice or moral law as instinct. Some will say that we feel we "Ought" to behave decently because it is best for society, but this argument falls short. Often the things that we would judge bad are not inconenient for us at all. If someone were to sell out his own countrymen to you and this helped you win the war, it would be extremely convenient for you and yet you would regard this man as untrustworthy and shady. This law is rigid and unbending and is there.