Psalm 110

grows out of · a priest forever

A thousand years after Genesis 14, David sings of a figure who is both at God's right hand and a priest after the order of Melchizedek — reopening a single, brief encounter as prophecy.

points forward to · the argument's hinge

Hebrews quotes Psalm 110:4 repeatedly. Because the psalm names a priesthood outside Levi, priesthood was always going to change hands.

grows out of · sit at my right hand

Peter quotes Psalm 110 at Pentecost to interpret the ascension: the enthronement the psalm describes has happened.