(ii)  Next in order come the Proœmium de Judicio Dei (προοίμιον περὶ κρίματος Θεοῦ) and the De Fide (περὶ πίστεως).  These treatises were prefixed by Basil to the Moralia.  He states that, when he enquired into the true causes of the troubles which weighed heavily on the Church, he could only refer them to breaches of the commandments of God.  Hence the divine punishment, and the need of observing the Divine Law.  The apostle says that what is needed is faith working by love.  So St. Basil thought it necessary to append an exposition of the sound faith concerning the Father, the Son, and the Holy Ghost, and so pass in order to morals. De Jud. Dei. § 8.  It has, however, been supposed by some cf. Ceillier VI. viii. 3. that the composition published in the plan as the De Fide is not the original tract so entitled, but a letter on the same subject written, if not during the episcopate, at least in the presbyterate.  This view has been supported by the statement “Thus we believe and baptize.” οὕτως φρονοδμεν καὶ οὕτως Βαπτίζομεν εἰς Τοιάδα ὁμοούσιον, κατὰ τὴν ἐντολὴν αὐτοῦ τοῦ κυρίου ἡμῶν ᾽Ιησοῦ Χριστοῦ εἰπόντος πορευθέντες μαθητεύσατε κ.τ.λ. §; the co-essential Trinity being described as involved in the baptismal formula.