Psalms 68:1-3

Let God arise, &c. As God was in a peculiar manner present in the ark, and as his presence was the great security of the Israelitish nation from the dangers of the wilderness, and the power of their enemies, Moses addressed his prayer to him in these words whenever the ark was taken up for their several marches: see Numbers 10:35. And in these same words the singers began, when, at the command of David, the Levites first took up the ark on their shoulders to carry it from the house of Obed-edom to Zion. There is, indeed, this little difference between the passage in Numbers and this of the Psalm, that the first word of the former in the Hebrew is in the imperative mood, קומה, kumah, Let God arise, whereas here the word is in the future tense, and is literally rendered, God shall, or will, arise. And, in like manner, all the clauses of this and the next two verses are expressed in the same tense, as if they were a prediction of what was to come; his enemies shall be scattered those that hate him shall flee, &c. God's enemies, it must be observed, are also the enemies of his people, and they are therefore said to hate him, because they hate them, and because they hate his laws and government, and his holy image and nature; the carnal mind which is in them, being enmity against him, and not subject to his law, neither, indeed, can it be subject thereto. As smoke is driven away Which, though it rises from the earth in black and tremendous clouds, is soon scattered and dispersed by the wind; so drive them away Or, so they shall be driven away, shall be dispersed by a force which, notwithstanding their threatening aspect, they are utterly unable to resist. And as wax melteth before the fire Which, though to appearance it be of a firm and solid consistence, yet, when brought to the fire, is soon dissolved, and makes no resistance; so let the wicked perish, &c. And so they shall perish when the Lord is revealed from heaven, with his mighty angels, in flaming fire. But let the righteous be glad, &c. For God's gracious appearance in their behalf, and for his settled presence with them.