Bede the Venerable
Catena Aurea · Lukasevangelium 21
And when these things begin to come to pass, then look up, and lift up your heads; for your redemption draweth nigh. And he spake to them a parable; Behold the fig tree, and all the trees; When they now shoot forth, ye see and know of your own selves that summer is now nigh at hand. So likewise ye, when ye see these things come to pass, know ye that the kingdom of God is nigh at hand. Verily I say unto you, This generation shall not pass away, till all be fulfilled. Heaven and earth shall pass away: but my words shall not pass away.
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.