This work offers an introduction to John Paul II's theory of the human person. The development of Karol Wojtyla's theology is developed - from his lesser-known writings such as The Lublin Lectures - to his more popular writings Love and Responsibility and The Acting Person. The author finds that Wojtyla is a consistent thinker. Unlike many of his contemporaries, his thought has never undergone any intellectual revolution or change. His earlier writings thus make possible a fuller appreciation of the more popular texts and Papal encyclicals.