What is the theological place of the Holy Spirit with respect to the forgiveness of sins in the sacrament of penance? This study examines the role of the Spirit in the theology of sacramental forgiveness of Thomas Aquinas (1224/5-1274), who is often blamed for the "Geistvergessenheit" of Western theology. In the first part of this study it is shown that in Thomas' theology notions like guilt and forgiveness function within the context of a relationship...