Abstract
This study intends to show how the essential elements in the debate over the divinity of the Son provoked by Arianism are already present within the Alessandrian Church during the first decades of the 3rd century. From the works of Origen it becomes apparent that his teaching on the eternity of the Logos intends to oppose those who asserted a temporal beginning thus separating the Logos from the divinity of the Father, which allows us to define them as radical supporters of the theology of the Logos. Against this doctrine, there is an identified opposition which probably utilized the term ὁμοούσιος to indicate to the contrary the divinity of the Son; nevertheless Origen, while proposing that the Son is generated from the ousia of the Father, does not share this teaching because in his theology the Son remains subordinate to the Father.