As Gordon so wonderfully points out, moral living is a by-product. Not a by-product of moralism preaching, but of knowing Christ. We are sanctified by grace. Its all of Jesus. If we don't get this it is so easy to assume that moral behaviour = faith, rather than moral behaviour flows from faith. Trying to get the outward conformity to moral principle without the inward transformation of the heart by grace is a hopelessly doomed exercise. Our hearts are hard-wired in exactly the opposite direction.