[The spiration and procession of the Holy Spirit is not by two separate acts, one of the Father, and one of the Son—as perhaps might be inferred from Augustin’s remark that “the Holy Spirit proceeds from the Father principally.” As Turrettin says: “The Father and Son spirate the Spirit, not as two different essences in each of which resides a spirative energy, but as two personal subsistences of one essence, who concur in one act of spiration.” Institutio III. xxxi. 6.—W.G.T.S.]