“In his representation of the distinction (of the Persons of the Blessed Trinity), Tertullian sometimes uses expressions which in aftertimes, when controversy had introduced greater precision of language, were studiously avoided by the orthodox. Thus he calls the Father the whole substance, the Son a derivation from or portion of the whole.” (Bp. Kaye, On Tertullian, p. 505). After Arius, the language of theology received greater precision; but as it is, there is no doubt of the orthodoxy of Tertullian’s doctrine, since he so firmly and ably teaches the Son’s consubstantiality with the Father—equal to Him and inseparable from him. [In other words, Tertullian could not employ a technical phraseology afterwards adopted to give precision to the same orthodox ideas.]