And He shall purify the sons of Levi!  If you recognize this line from a Christmas song by chance, that is because there is a very beautiful oratorio composed around several Old Testament passages concerning the focal point of all history, the Messiah promised by God.  That same God says in Malachi that the sons of Jacob are not consumed.  Why not?

-Because God is good-

-Because God is love-

-Because of the Messiah-

-Because God never changes-