Graeco-Roman beliefs differed from Abrahamic religious traditions in the ways they approached the nature of the divine, forms of worship, and ritual law. Many of the family traditions of Roman civilization were maintained by Christians.
In terms of the nature of the divine, most members of the Graeco-Roman world who were not members of the Abrahamic religions (Judaism, Islam, and Christianity) were polytheists, believing in the existence of many gods, as opposed to monotheists, who believe in the existence of only one God.
Both Graeco-Roman and Abrahamic religions share strong ritual components, including forms of initiation, shared ritual meals, and rituals including saying certain words and making certain gestures at specific times (prayers, hymns, etc.). Both traditions include forms of making offerings to gods and having specific sacred spaces and images. They differ in that many Graeco-Roman deities operated on a principle known as "do ut des" ("I give that you might give"), demanding rituals and sacrifices but not concerned with the internal states or beliefs of worshipers. Thus, although some ancient deities regulated behavior (e.g. guest friendship, kinship ties), they were less concerned with purely internal types of faith and belief than the Abrahamic deities.