In thinking about the theme of this volume, it has been my principal interest to investigate how men who belonged to the Greek-speaking elites of the later Roman Empire, such as Gregory of Nazianzus, understood and expressed notions of “heavenly realms and earthly realities.” Specifically, how did Gregory of Nazianzus conceptualize instances in which the two realms met, and how did he perceive his role in bringing about such “meetings”? The answer to these questions points to a larger issue: How did Gregory and others like him understand salvation and the mechanisms by which it was achieved? For Gregory, a proper understanding of the manner in which the imagined realms of the (Neo-)Platonic cosmic spheres could intersect with the material realm below them was essential for attaining salvation. Each individual could actualize this process of salvation within himself or herself, but only by fully comprehending the mystery exemplified in the unprecedented merging of the two realms in the Incarnation.