In what sense is God one? How can those who worship Jesus Christ, his Father, and the Holy Spirit claim to be monotheists? These questions were answered by the early church, and their answering analogies, models, and language have come down to the church today. However, theology is not stagnant, and the twentieth century has seen several new models of the Trinity emerge. Many of these models have focused on the three persons without adequately considering the consequences for the unity of God....