Origen seems to have been the first ecclesiastical writer to use the word "homoousios" in a nontrinitarian context, but it is evident in his writings that he considered the Son's divinity lesser than the Father's, since he even calls the Son a creature. It was by Athanasius of Alexandria and the Nicene Council that the Son was taken to have exactly the same essence with the Father, and in the Nicene Creed the Son was declared to be as immutable as his Father.