'Forever' in the Bible

But about the Son [the Father says to Him],“Your throne, O God, is forever and ever,And the scepter of [absolute] righteousness is the scepter of His kingdom.

how will we escape [the penalty] if we ignore such a great salvation [the gospel, the new covenant]? For it was spoken at first by the Lord, and it was confirmed to us and proved authentic by those who personally heard [Him speak],

just as He also says in another place,“You are a priest [appointed] foreverAccording to the order of Melchizedek.”

where Jesus has entered [in advance] as a forerunner for us, having become a High Priest forever according to the order of Melchizedek.

For it is attested [by God] of Him,“You (Christ) are a Priest foreverAccording to the order of Melchizedek.”

(for those Levites who formerly became priests [received their office] without [its being confirmed by the taking of] an oath, but this One [was designated] with an oath through the One who said to Him,“The Lord has swornAnd will not change His mind or regret it,‘You (Christ) are a Priest forever’”).

but, on the other hand, Jesus holds His priesthood permanently and without change, because He lives on forever.

For the Law appoints men as high priests who are weak [frail, sinful, dying men], but the word of the oath [of God], which came after [the institution of] the Law, permanently appoints [as priest] a Son who has been made perfect forever.

For by the one offering He has perfected forever and completely cleansed those who are being sanctified [bringing each believer to spiritual completion and maturity].

Jesus Christ is [eternally changeless, always] the same yesterday and today and forever.

equip you with every good thing to carry out His will and strengthen you [making you complete and perfect as you ought to be], accomplishing in us that which is pleasing in His sight, through Jesus Christ, to whom be the glory forever and ever. Amen.