7 Changes Between the Old & New Covenants (Part 7) / 2024, Rex Sexton, Sermon / By admin In as much as the accoutrements of Aaron’s priestly robe were symbolic of the New Jerusalem, so too was the role he played. In this installment, Mr. Sexton examines the most notable change of covenant, that Jesus Christ has become our high priest. According to the foreshadow of Melchizedek, He remains a priest forever.