Bede the Venerable — as excerpted in the Catena Aurea on Luke 21:28-33

“But by the heaven which shall pass away we must understand not the æthereal or the starry heaven, but the air from which the birds are named “of heaven.” But if the earth shall pass away, how does Ecclesiastes say, The earth standeth for ever? (Ecc. 1:4.) Plainly then the heaven and earth in the fashion which they now have shall pass away, but in essence subsist eternally.”