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Origen’s On First Principles is a foundational work in the development of Christian thought and doctrine: it is the first attempt in history at a systematic Christian theology. For over a decade it has been out of print with only expensive used copies available; now it is available at an affordable price and in a more accessible format.

On First Principles is the most important surviving text written by third-century Church father, Origen. Origen wrote in a time when fundamental doctrines ...