fire - every kind of judgment (Eze 19:12; Eze 21:3, “my sword”; Jer 21:14).
green tree ... dry - fit and unfit materials for fuel alike; “the righteous and the wicked,” as explained in Eze 21:3, Eze 21:4; Luk 23:31. Unsparing universality of the judgment!
flaming flame - one continued and unextinguished flame. “The glowing flame” [Fairbairn].
faces - persons; here the metaphor is merged in the reality.