Theophylact of Ohrid

That is, it passes away and is destroyed. Why then become attached to that which is destroyed? By the term "figure" he showed that the things of the present world only flash before the eyes, are exceedingly fleeting, and have nothing solid or substantial in them.

Commentary on 1 Corinthians ↗

Irenaeus

As to their malignantly asserting that if heaven is indeed the throne of God, and earth His footstool, and if it is declared that the heaven and earth shall pass away, then when these pass away the God who sitteth above must also pass away, and therefore He cannot be the God who is over all; in the first place, they are ignorant what the expression means, that heaven is [His] throne and earth [His] footstool. …

Against Heresies Book IV ↗

Methodius of Olympus

But if our opponents say, How then is it, if the universe be not destroyed, that the Lord says that "heaven and earth shall pass away;" and the prophet, that "the heaven shall perish as smoke, and the earth shall grow old as a garment;" we answer, because it is usual for the Scriptures to call the change of the world from its present condition to a better and more glorious one, destruction; as its earlier form is lost in the change of all things to a state of greater splendour; for there is no contradiction nor absurdity in the Holy …

From the Discourse on the Resurrection ↗

Bonaventure

Now the figure of this world is said to pass away, not as regards the total destruction of this sensible world, but because through the action of that fire all flammable elementary things will be consumed, plants and animals; the elements will be purged and renewed, especially air and earth; the just will be purged and the reprobate will be burned; and when these things have been accomplished, the motion of the heavens will also cease, so that, with the number of the elect completed, there may come about a certain renewal and …

Breviloquium, Part 7 ↗