In The Pauline Epistles
See also: Paul of Tarsus and JudaismThough the term mercy seat usually appears as the English translation for the Greek term hilasterion in the Epistle to the Hebrews, most translations are usually inconsistent as they instead generally translate hilasterion as propitiation where it occurs in the Epistle to the Romans. The Epistle to the Hebrews recounts the description of the Ark, Holy of Holies, and mercy seat, and then goes on to portray the role of the mercy seat during Yom Kippur as a prefiguration of the Passion of Christ, which it argues was a greater atonement, and formed a New Covenant; the text continues by stating that the Yom Kippur ritual was merely a shadow of things to come,. The continual sacrifice for sin became obsolete once Jesus had died. This is the whole thrust of Hebrews ch 10, but is especially clearly stated in v11-14. The Epistle to the Romans states that Jesus was sent by God as a propitiation, while, perhaps in a reflection on Ezekiel's atonement ceremony, the Second Epistle to the Corinthians argues that Jesus had become a sin offering.
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