Matthew Poole and continuators on Isaiah 64:1

1 O That thou would'st rent the heavens , that thou wouldest come down, that the mountains might flow down at thy presence.

Either the earnest desire of the Prophet, or the Jews strong wish for the coming of the Messias: Or rather, their cry to God for vengeance upon their Adversaries, on consideration of the Enemies unmerciful dealing with them, and their insolent and opprobrious usage of God in his Temple; partly expressing their hast and earnestness, and partly intimating, that God would do it with violence and sury, implied in the word Renting them, Psal. 18. 6, 7, &c. spoken after the manner of man, who, if he were shut up, must have room made for his coming forth: This God is said to do, when he puts forth some signal manifestation of his Power, Psal. 144. 5. a Metaphor taken from men, that, when they would resolutely and effectually help one in distress, break, and fling open doors, and whatever may hinder coming to their relief.

Or, melt, Psal. 68. 1, 2. & 97. 5. Micah 1. 3, 4. that all impediments might be removed out of the way; possibly an allusion to God's coming down upon Mount Sinai in those terrible flames of fire, Iudg. 5. 4, 5.

Marginal references: Amos 9. 5. Micah 1. 4.