and having a great priest over the house of God;
Let us hold fast the profession of our faith without wavering,.... Either in the grace or doctrine of faith, or in the profession of both; See Gill on Heb 4:14. For he is faithful that promised; that is God; and it is true of Father, Son, and Spirit; but God the Father may be more especially designed: he is a promising God, and is known...
high priest--As a different Greek term (archiereus) is used always elsewhere in this Epistle for "high priest," translate as Greek here, "A Great Priest"; one who is at once King and "Priest on His throne" (Zac 6:13); a royal Priest, and a priestly King. house of God--the spiritual house, the Church, made up of believers, whose home is heaven, where Jesus now is (Heb 12:22-23).
Verse 21. And having an High Priest over the house of God. Over the spiritual house of God; that is, the church. Comp. . Under the Jewish dispensation there was a great high priest, and the same is true under the Christian dispensation, This the apostle had shown at length in the previous part of the epistle.