Meaning of Homoousios in the 4th-Century Controversy
This article re-examines the origin, development, and theological ambiguity of the Greek term homoousios (“of the same substance”) during the fourth-century Arian Controversy. Drawing on contemporary patristic scholarship—including works by R.P.C. Hanson, Lewis Ayres, Rowan Williams, and Khaled Anatolios—the text challenges traditional 19th-century accounts of early church history. It traces how homoousios evolved from non-biblical, pagan, and Sabellian contexts into a pivotal phrase forced into the Nicene Creed under the influence of Emperor Constantine. The study demonstrates that rather than denoting a fixed numerical identity of substance in 325 AD, the term initially carried a flexible, controversial, and largely non-material meaning that served as a catalyst for theological debate rather than an immediate consensus.



