In Early Christian Thinkers: The Lives and Legacies of Twelve Key Figures edited by Paul Foster the chapter on Eusebius of Caesarea is written by Timothy David Barnes.
This is the final chapter of this book. There have been some good chapters and some less than good. This chapter on Eusebius is a good one. I found it informative. Barnes critiques that idea that Eusebius was that close to Constantine arguing that he may have met him no more than four times (pp. 173-175). He became a Bishop of Caesarea in 313 (p. 175). Because of his association with the teachings of Origen (regarding Jesus as a “Second Lord” and “Second God”) he had to get a provisional excommunication lifted to participate at the Coucil of Nicaea (p. 176). For the most part he remained sympathetic to Arianism for the rest of his life (even participating in the Council of Tyre “which deposed Athanasius as bishop of Alexandria in 335, p. 177), but he watched his language to avoid being excommunicated.
Barnes discusses some of Eusebius’ works (pp. 178-184) and provides a bibliography (pp. 184-189).
Then he returns to Eusebius’ “theology.” He explains his connection to the teachings of Origen. He explained how the starting point of his Christology was that the Father and Son do not share a single “ousia or hypostasis“ which is contrary to Nicene Christology (p. 190). It was through this paradigm of a “subordinate Logos” that he explained everything from the creation of humanity through to the final judgment.
I admit, I knew Eusebius waffled a bit, but I didn’t know he was essentially Arian.
Anyways, it was a good chapter and very helpful as an introduction.