Gregory Thaumaturgus

“ For Paul addresses the Father as one in respect of divinity, and speaks of the Son as one in respect of lordship: “There is one God the Father, of whom are all things, and we for Him; and one Lord Jesus Christ, by whom are all things, and we by Him.” ”

“ But divinity is the property of the Father; and whenever the divinity of these three is spoken of as one, testimony is borne that the property [2] of the Father belongs also to the Son and the Spirit: wherefore, if the divinity may be spoken of as one in three persons, the trinity is established, and the unity is not dissevered; and the oneness which is naturally the Father’s is also acknowledged to be the Son’s and the Spirit’s. If one, however, speaks of one person as he may speak of one divinity, it cannot be that the two in the one are as one. ”