Berkhof studies some perversions of the gospel from the time of the early New Testament church to when Gnosticism took centre stage. In the early church he takes note of perversions such as those of the Nazarenes, the Ebionites, and the Elkesaites. He also examines Gnosticism, its origins, character, teachings, and historical significance.
Source: Reformed Perspectives Magazine, 2007. 3 pages.