The sermon traces the biblical and theological foundation of the Lord's Supper by unfolding a narrative from Abraham's time, centered on Melchizedek—a mysterious priest-king of Salem who blessed Abraham and received a tithe, symbolizing a priesthood superior to the Levitical order. This figure is revealed in Scripture as a type pointing to Jesus Christ, the eternal High Priest after the order of Melchizedek, who fulfills the promise of a permanent, sinless priesthood. The Lord's Supper is thus not merely a ritual but a sacred remembrance of Christ's sacrificial death, resurrection, and ongoing reign, patterned directly on Jesus' own command during the Last Supper. The practice is rooted in Scripture, intended to proclaim Christ's death until He comes, and is to be observed with reverence, unity, and doctrinal purity, reflecting the church's identity as a gathered people called out by God to worship Him in truth and spirit.