Wherefore the LORD God of Israel saith, I said indeed that thy house, and the house of thy father, should walk before me for ever: but now the LORD saith, Be it far from me; for them that honour me I will honour, and they that despise me shall be lightly esteemed. Should walk before me for ever - See Exodus 29:9; Exodus 40:15; Numbers 25:10-13, where it is positively promised that the priesthood should be continued in the family of Aaron For Ever. But although this promise appears to be absolute, yet we plainly see that, like all other apparently absolute promises of God, it is conditional, i.e., a condition is implied though not expressed.
But now - be it far from me - You have walked unworthily; I shall annul my promise, and reverse my ordinance. See Jeremiah 18:9, Jeremiah 18:10.
For them that honor me - This is a plan from which God will never depart; this can have no alteration; every promise is made in reference to it; "they who honor God shall be honored; they who despise him shall be lightly esteemed."