Lit. a great priest. Comp. Lev 21:10, lxx. Not merely = ἀρχιερεὺς high priest, but emphasizing Christ's superior greatness as high priest.
House of God (οἶκον τοῦ θεοῦ)
In the Gospels always of the temple. Not found in Paul. Once in the Pastorals, of the church, 1Ti 3:15, and so 1Pe 4:17. Here the whole Christian family. Comp. 1Co 3:16, 1Co 3:17; 2Co 6:16; Eph 2:22.