Chapter XVII.
Against those who say that the Holy Ghost is not to be numbered with, but numbered under, the Father and the Son. Wherein moreover there is a summary notice of the faith concerning right sub-numeration.
ΚΕΦΑΛΑΙΟΝ ΙΖʹ Πρὸς τοὺς λέγοντας μὴ συναριθμεῖσθαι Πατρὶ καὶ Υἱῷ τὸ ἅγιον Πνεῦμα, ἀλλ' ὑπαριθμεῖσθαι: ἐν ᾧ καὶ περὶ τῆς εὐσεβοῦς συναριθμήσεως κεφαλαιώδης ἐπιδρομὴ τῆς πίστεως.