(for [Levitical] priests were appointed without [God] taking [such] an oath, but Christ was appointed with an oath by God when He said to Him [Psa. 110:4], "The Lord made a vow and will not change His mind [when He said], 'You are a priest forever')."

For the law of Moses appoints [morally] weak men to be head priests, but the message of [God's] oath, which came after that law [Note: The quotation from Psa. 110:4 (See verse 21) was written after the law of Moses was given] appointed the Son, who was made perfect [in every way] forever.

He was faithful to God who appointed Him, just as Moses was [also] faithful in [serving] God's household [i.e., the Israelites].

And no one takes on himself the honor [of head priest], but [he is appointed only] when he is called by God, as was the case with Aaron.