11. So, too, the Spirit is also called the Finger of God, because there is an indivisible and inseparable communion between the Father, the Son, and the Holy Spirit. For as the Scripture called the Son of God the Right Hand of God, as it is said: “Thy Right Hand, O Lord, is made glorious in power. Thy Right Hand, O Lord, hath dashed in pieces the enemy;” Ex. xv. 6. so the Holy Spirit is called the Finger of God, as the Lord Himself says: “But if I by the Finger of God cast out devils.” S. Luke xi. 20. For in the same place in another book of the Gospel He named the Spirit of God, as you find: “But if I by the Spirit of God cast out devils.” S. Matt. xii. 28.