Next, that it is a continuation of the third book: for the third was about the sending forth of the Word in flesh, but this book is about the effects of the Incarnate Word, so that the fourth book corresponds to the third just as the second does to the first.
Sic ergo ex verbis propositis tria possumus accipere circa hunc quartum librum, qui prae manibus habetur, scilicet materiam: quia in eo agitur de sacramentis, et de resurrectione et gloria resurgentium.