(5) Seeing then that we have a great high priest, that is passed into the heavens, Jesus the Son of God, let us (k) hold fast [our] profession.
(5) Now he compares Christ's priesthood with Aaron's, and declares even in the very beginning the marvellous excellency of this priesthood, calling him the Son of God, and placing him in the seat of God in heaven, plainly and openly contrasting him with Aaron's priests, and the transitory tabernacle. He expands on these comparisons in later passages.
(k) And let it not go out of our hands.