This letter explains that Eusebius of Caesarea and his colleagues participated in the Nicene Council, where they affirmed their orthodox Christian faith and adopted the Nicene Creed, including the phrase "one in essence" to describe the relationship between the Father and the Son.
They detail how they carefully examined and understood the Council's formulations, ensuring they aligned with Scripture and traditional beliefs, and how even the emperor supported these formulations, clarifying their theological significance.
Ultimately, Eusebius emphasizes their commitment to maintaining true doctrine by scrutinizing and accepting the Council's language, even when it required careful explanation and reflection to understand terms like "one in essence" and the nature of Christ's begottenness.