It is obligatory to note upfront that Origen was and is a controversial figure. The debate over accepting his views as orthodox or useful is ongoing, including the veracity of the number of times he was anathematized, whether or not he actually taught some of the doctrines he was accused of teaching, the extent to which he influenced Arius, and whether one should be posthumously anathematized without the opportunity to recant. Some of these debates are discussed in following footnotes.
Despite this caveat, given his enormous (and positive) impact on early Trinitarianism, it is interesting to consider how his teachings influenced Trinitarian history. Most notably, he seemed to wrestle more fully than his predecessors with the ontological implications of the shared substance of the Father, Son, and Spirit that would later define the orthodox Trinitarian affirmations. This is not to say that Origen was ultimately as clear on ontology as…
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