God's judgment on the wicked,
Malachi 4:1 For behold, the day cometh, burning as a furnace; and all the proud and all that work wickedness shall be stubble; and the day that cometh shall burn them up, saith Jehovah of hosts, so that it shall leave them neither root nor branch.
and his blessing on the good.
Malachi 4:2 And unto you that fear my name shall the Sun of righteousness arise with healing in his wings; and ye shall go forth and leap like fatted calves. Malachi 4:3 And ye shall tread down the wicked; for they shall be ashes under the soles of your feet in the day that I prepare, saith Jehovah of hosts.
He exhorteth to the study of the Law,
Malachi 4:4 Remember the law of Moses my servant, which I commanded unto him in Horeb for all Israel, the statutes and ordinances.
and telleth of Elijah's coming and office.
Malachi 4:5 Behold, I send unto you Elijah the prophet, before the coming of the great and terrible day of Jehovah. Malachi 4:6 And he shall turn the heart of the fathers to the children, and the heart of the children to their fathers, lest I come and smite the earth with a curse.