Oh, that you would rend the heavens and come down,
    that the mountains would tremble before you!
2 As when fire sets twigs ablaze
    and causes water to boil,
come down to make your name known to your enemies
    and cause the nations to quake before you!

Isaiah’s logic is simple and straightforward. When we see ”twigs ablaze” that is an effect, and there is a cause: ”fire”. Again, when we see the effect of water boiling, the cause is to be found in that same ”fire”. The prophet is praying for certain effects in the world: God’s Name made known to His enemies, the nations coming to fear Him, (even physical manifestations in the natural realm). The great cause will be God ‘coming down’ in power. He’s done it before; He can do it again. Let’s join Isaiah in his posture of prayer