Ambrose of Milan
Catena Aurea · Lukasevangelium 21
And there shall be signs in the sun, and in the moon, and in the stars; and upon the earth distress of nations, with perplexity; the sea and the waves roaring; Men’s hearts failing them for fear, and for looking after those things which are coming on the earth: for the powers of heaven shall be shaken. And then shall they see the Son of man coming in a cloud with power and great glory.
So severe then will be the manifold fires of our souls, that with consciences depraved through the multitude of crimes, by reason of our fear of the coming judgment, the dew of the sacred fountain will be dried upon us. But as the Lord’s coming is looked for, in order that His presence may dwell in the whole circle of mankind or the world, which now dwells in each individual who has embraced Christ with his whole heart, so the powers of heaven shall at our Lord’s coming obtain an increase of grace, and shall be moved by the fulness of the Divine nature more closely infusing itself. There are also heavenly powers which proclaim the glory of God, which shall be stirred by a fuller infusion of Christ, that they may see Christ.