Dr. John Rao discusses early Christianity and the Greco-Roman world including early heresies. Christ warned us that heresies would come. They were already alive in the First, Second and early Third Centuries. Dr. John Rao discusses here the problems caused both for the Christian community in and of itself as well as for its relationship with the Roman State by Gnostics, Mani, the Montanists and supporters of erroneous Trinitarian beliefs.