Paul Tillich's classic work confronts the age-old question of how the moral is related to the religious. In particular, he addresses the conflict between reason-determined ethics & faith-determined ethics & shows that neither is dependent on the other but that each alone is inadequate. Instead, he reveals that the gift that came with the arrival of Christ: a new reality that offers a power of being in which we can participate & out of which true thought & right action are possible.