All these events are manifestly in the future from the prophet’s point of view, yet the verbs are all in the perfect tense. Apparently these are prophetic perfects. Isaiah has a point of view different from the normal one. In the uncertainty of his own milieu he nonetheless can look at a future moment and describe its events with the certainty of completed actions. No medium or spiritist could do that. The spirits could not explain the origins of the earth, much less the end of it (cf. 41:21–24). But God could give that kind of insight to his prophet.
