Further, it should be understood that we do not speak of the Father as derived from any one, but we speak of Him as the Father of the Son. And we do not speak of the Son as Cause Text, αἴτιον: variant, ἀναίτιον, causeless. or Father, but we speak of Him both as from the Father, and as the Son of the Father. And we speak likewise of the Holy Spirit as from the Father, and call Him the Spirit of the Father. And we do not speak of the Spirit as from the Son Maxim. Epist. ad Marin.: ἐκ τοῦ Υἱοῦ δὲ τὸ Πνεῦμα οὐ λέγομεν. See also ch. xii., καὶ Υἱοῦ Πνεῦμα οὐχ ὡς ἐξ αὐτοῦ, and at the close of the Epist. ad Jordan, Πνεῦμα Υἱοῦ μὴ ἐξ Υἱοῦ.but yet we call Him the Spirit of the Son. For if any one hath not the Spirit of Christ, he is none of His Rom. viii. 9., saith the divine apostle. And we confess that He is manifested and imparted to us through the Son. For He breathed upon His Disciples, says he, and said, Receive ye the Holy Spirit St. John xx. 29.. It is just the same as in the case of the sun from which come both the ray and the radiance (for the sun itself is the source of both the ray and the radiance), and it is through the ray that the radiance is imparted to us, and it is the radiance itself by which we are lightened and in which we participate. Further we do not speak of the Son of the Spirit, or of the Son as derived from the Spirit Greg. Naz., Orat. 37..