JST, Hebrews 7:3. Compare Hebrews 7:3
Melchizedek was a priest after the order of the Son of God. All those who receive this priesthood can become like the Son of God.
3 For this Melchizedek was ordained a priest after the order of the Son of God, which order was without father, without mother, without descent, having neither beginning of days, nor end of life. And all those who are ordained unto this priesthood are made like unto the Son of God, abiding a priest continually.
JST, Hebrews 7:19–21. Compare Hebrews 7:19–21
The law prepared people for Jesus, who is “the surety of a better testament.”
19 For the law was administered without an oath and made nothing perfect, but was only the bringing in of a better hope; by the which we draw nigh unto God.
20 Inasmuch as this high priest was not without an oath, by so much was Jesus made the surety of a better testament.
21 (For those priests were made without an oath; but this with an oath by him that said unto him, The Lord sware and will not repent, Thou art a priest forever after the order of Melchizedek;)
JST, Hebrews 7:25–26. Compare Hebrews 7:26–27
Jesus offers Himself as a sinless sacrifice for our sins.
25 For such an high priest became us, who is holy, harmless, undefiled, separate from sinners, and made ruler over the heavens;
26 And not as those high priests who offered up sacrifice daily, first for their own sins, and then for the sins of the people; for he needeth not offer sacrifice for his own sins, for he knew no sins; but for the sins of the people. And this he did once, when he offered up himself.