 Both instances imply an underlying "sacratio", act of consecration.The "sacramentum" differs from "iusiurandum", which is more common in legal application, as for instance swearing an oath in court.A "sacramentum" establishes a direct relation between the person swearing (or the thing pledged in the swearing of the oath) and the gods; the "iusiurandum" is an oath of good faith within the human community that is in accordance with "ius" as witnessed by the gods.