I’ve actually been enjoying a series of blog articles by Dale Tuggy at trinities. Tuggy’s argument is that the Ante-Nicene Fathers were unitarians, not trinitarian. He offers this definition of an Abrahamic unitarian: “someone who believes that the one God just is (i.e. is numerically identical to) a certain self, namely YHWH, and not to any other self.” A Christian unitarian is thus someone “who accepts [that] this one true God’s Messiah is the man Jesus.”
Tuggy believes that with the rise of trinitarian faith in the fourth century, as articulated by Athanasius and the Cappadocians, and the suppression of the older subordinationism a virtually new religion was created. Needless to say, Orthodox and Catholic Christians will find this proposal implausible. We believe that the Christian faith as lived in the Church has always been trinitarian, despite the failure of theologians in the second and third centuries to express this faith clearly, accurately, fully. It was not an easy thing for the Church to Christianize Hellenism, or to put it somewhat differently, it was not an easy thing for Hellenists to learn how to be, think, and pray Christian.