Langenscheit Shorter Latin Dictionary , McGraw-Hill Book Company, 1969. 5 Barth was a very influential theologian in the first half of the century. 6 Calvin was a reformer of the church during the early 1600's. He is considered the spiritual father of the Presbyterian and Reformed churches. These are all ancient bodies of Christians that boast of historical roots to the apostolic age.
Early tradition assigns each church to some apostolic figure.
All of these Christian bodies continue to exist in their various countries of origin. 8 Modalism is a belief that God assumed the role of Father, then that of the Son and finally that of the Holy Spirit.