BOOK THIRTEENTH.

Wherefore, when our Lord breathed on His disciples, and said, "Receive ye the Holy Ghost," He certainly wished it to be understood that the Holy Ghost was not only the Spirit of the Father, but of the only-begotten Son Himself. For the same Spirit is, indeed, the Spirit of the Father and of the Son, making with them the trinity of Father, Son, and Spirit, not a creature, but the Creator. For neither was that material breath which proceeded from the mouth of His flesh the very substance and nature of the Holy Spirit, but rather the intimation, as I said, that the Holy Spirit was common to the Father and to the Son; for they have not each a separate Spirit, but both one and the same. Now this Spirit is always spoken of in sacred Scripture by the Greek word πνεῦμα, as the Lord, too, named Him in the place cited when He gave Him to His disciples, and intimated the gift by the breathing of His lips; and there