Moffatt(i)
17 for the witness to him is, Thou art priest for ever, with the rank of Melchizedek.
18 A previous command is set aside on account of its weakness and uselessness
19 (for the Law made nothing perfect), and there is introduced a better Hope, by means of which we can draw near to God.
20 A better Hope, because it was not promised apart from an oath.
21 Previous priests became priests apart from any oath, but he has an oath from Him who said to him, The Lord has sworn, and he will not change his mind, thou art a priest for ever.
22 And this makes Jesus surety for a superior covenant.