Book excerpt: Faith & Morals Here - carefully documented, footnoted, and indexed - is not only what the Church teaches but also why it is obligated to do so. And, why its members are obligated to examine and to apply that teaching. This updated and expanded edition of a text long trusted and widely used in colleges, universities, and seminaries (as well as in high schools and parish religious-education programs), offers the latest Catholic teaching on moral theology, including: Moral theology: its nature, purpose, and biblical foundation Human dignity, free human action, virtue, and conscience Natural law, moral absolutes, and sin Christian faith and our moral life Read why - and how - living what the Church teaches can transform hearts, minds, and souls.