Charles H. Spurgeon on Psalms 18:8

"There went up a smoke out of his nostrils." A violent oriental method of expressing fierce wrath. Since the breath from the nostrils is heated by strong emotion, the figure portrays the Almighty Deliverer as pouring forth smoke in the heat of his wrath and the impetuousness of his zeal. Nothing makes God so angry as an injury done to his children. He that toucheth you toucheth the apple of mine eye. God is not subject to the passions which govern his creatures, but acting as he does with all the energy and speed of one who is angry, he is here aptly set forth in poetic imagery suitable to human understandings. The opening of his lips is sufficient to destroy his enemies; "and fire out of his mouth devoured." This fire was no temporary one but steady and lasting; "Coals were kindled by it." The whole passage is intended to depict God's descent to the help of his child, attended by earthquake and tempest: at the majesty of his appearing the earth rocks, the clouds gather like smoke, and the lightning as flaming fire devours, setting the world on a blaze. What grandeur of description is here! Bishop Mant very admirably rhymes the verse thus: —

"Smoke from his heated nostrils came,

And from his mouth devouring flame;

Hot burning coals announced his ire,

And flashes of careering fire."