The chapter deals with the interpretation of the final canto of Dante's Divine Comedy. It focuses on the Dante's reinterpretation of the scholastic concept of raptus, culminating in the final geometric vision of the Holy Trinity.
Despite some abstractness, and impersonality of the whole vision, it is perhaps the most personal part of the Divine Comedy. Dante's experience of raptus is rather transformative than formative and the final vision is not only the culmination of Dante's spiritual journey, but its fundament as well; without a similar type of experience, Dante would probably never had written his masterpiece.