No grander vision of judgment exists than Malachi's picture of 'the day,' lurid, on the one hand, with the fierce flame, before which the wicked are as stubble that crackles for a moment and then is grey ashes, or as a tree in a forest fire, which stands for a little while, a pillar of flame, and then falls with a crash, shaking the woods; and on the otherhand, radiant with the early beams of healing sunshine, in whose sweet morning light the cattle, let out from their pent-up stalls, gambol in glee. But let us not forget while we admire the noble poetry of its form that this is God's oracle, nor that we have each to settle for ourselves whether that day shall be for us a furnace to destroy or a sun to cheer and enlighten.
We can only note in a sentence the recurrence in verse 1 of the phrases 'the proud' and they 'that work wickedness,' from verse 15 of chapter iii. The end of those whom the world called happy, and who seemed stable and elevated, is to be as stubble before the fire. We must also point out that 'the sun of righteousness' means the sun which is righteousness, and is not a designation of the Messiah. Nor can we dwell on the picture of the righteous treading down the wicked, which seems to prolong the previous metaphor of the leaping young cattle. Then shall 'the upright have dominion over them in the morning.'
III. The final exhortation and promise point backwards and forwards, summing up duty in obedience to the law, and fixing hope on a future reappearance of the leader of the prophets. Moses and Elijah are the two giant figures which dominate the history of Israel. Law and prophecy are the two forms in which God spoke to the fathers. The former is of perpetual obligation, the latter will flash up again in power on the threshold of the day. Jesus has interpreted this closing word for us. John came 'in the spirit and power of Elijah,' and the purpose of his coming was to 'turn the hearts of the fathers to the children' (Luke i. 16, 17); that is, to bring back the devout dispositions of the patriarchs to the existing generations, and so to bring the 'hearts of the children to their fathers,' as united with them in devout obedience. If John's mission had succeeded, the 'curse' which smote Israel would have been stayed. God has done all that He can do to keep us from being consumed by the fire of that day. The Incarnation, Life, and Death of Jesus Christ made a day of the Lord which has the twofold character of that in Malachi's vision, for He is a 'saviour of life unto life' or 'of death unto death,' and must be one or other to us. But another day of the Lord is still to come, and for each of us it will come burning as a furnace or bright as sunrise. Then the universe shall 'discern between the righteous and the wicked, between him that serveth God and him that serveth Him not.'