The first is in two parts: in the first, he shows what a sacrament is; in the second, the necessity of the institution of the sacraments, at: The sacraments were instituted for a threefold cause.
Hic dividit sacramentum in duas partes: et primo in partes integrales; secundo in partes subjectivas, ibi: jam videre restat differentiam sacramentorum veterum, et novorum.