See Jeremiah 31:31-34 and Luke 22:14-23. This is language first used in Jeremiah's promise of rescue and renewal of the exiled people of God...
For an overseer, as God's steward, must be above reproach. He must not be arrogant or quick-tempered or a drunkard or violent or greedy...
Christ was sent from the Father to prepare the heavenly Jerusalem. Christ's work was done in such a way that it would last forever....