In the middle decades of the ninth century, Charles the Bald, the West Frankish Carolingian ruler, received two treatises on the subject of the Eucharist. Paschasius Radbertus (ca. 790–ca. 865) and Ratramnus (d. after 868), both monks from the royal monastery at Corbie in Neustria, composed treatises entitled De corpore et sanguine domini.1 That these were the very first Latin Christian treatises devoted solely to the Eucharist and, further, that they came to different conclusions, has attracted well-earned scholarly scrutiny from almost immediately after their appearance. I would like to return to the question of the difference between their views. Specifically, I will show that the doctrinal differences between the two treatises have their roots in different approaches to, or—perhaps better—interests in, sacraments in general. The two authors do not take opposed positions on the topic of the sacraments, or even mutually contradicting positions on the Eucharist, rather they choose to emphasize different aspects of the sacrament, different guiding themes which suggest to each different lines of analysis. Paschasius sees sacraments primarily as instruments of unity, while Ratramnus views sacraments principally as salvific tools. This recognition yields two insights. It recalibrates analysis of the eucharistic tracts, foregrounding the contemporary concerns of the authors, while deliberately deemphasizing the subsequent theological controversies and scholarly debates into which the treatises were drawn. For both Paschasius and Ratramnus, distinctive approaches to sacraments color not only their analyses of the Eucharist, but also their approaches to larger political and social questions. This recognition also emphasizes the vibrance and creativity characteristic of the Carolingian theological milieu, too often dismissed as a supposedly derivative and unoriginal era in Christian theology. To these ends, the paper will proceed in four stages. First, I situate my question in the long historiography of the Corbie eucharistic treatises. Second, I briefly set the authors and their treatises in historical context. Third, I compare their ‘sacramental’ theologies of the Eucharist, underscoring both Paschasius's emphasis on its horizontal or communal significance and Ratramnus's stress on its vertical or salvific importance. Fourth, I trace how each author's particular sacramental interests remain consistent across their other projects with ramifications for their theological and social opinions.