The writer states that the priesthood of Melchizedek is better than Aaron's priesthood and then reminds them that the priesthood of Aaron did not make anything perfect.
The author says this because not all of Levi's sons became priests. AT: "The descendants of Levi who became priests" (See: [[rc://en/ta/man/translate/figs-distinguish]])
Here "brothers" means they are all related to each other through Abraham. AT: "from their relatives"
# they, too, have come from Abraham's body
This is a way of saying that they were descendants of Abraham. AT: "they, too, are descendants of Abraham" (See: [[rc://en/ta/man/translate/figs-metaphor]])
The things that God promised to do for Abraham are spoken of as if they were objects that he could possess. AT: the one to whom God had spoken his promises" (See: [[rc://en/ta/man/translate/figs-metaphor]])