“So Peter was kept in the prison,” etc. They, being at large, were at prayer: he, bound, was in sleep. “And he knew not that it was true.” If he thought it was true that was happening, he would have been astonished, he would not have remembered (all the circumstances): but now, seeming to be in a dream, he was free from perturbation. “When,” it says, “they were past the first and the second ward”— see also how strong the guard was— “they came unto the iron gate.” “Now know I that the Lord has sent His Angel.” Why is not this effected by themselves? (I answer,) By this also the Lord honors them, that by the ministry of His Angels he rescues them. Then why was it not so in the case of Paul? There with good reason, because the jailer was to be converted, whereas here, it was only that the Apostle should be released. And God disposes all things in various ways. And there too, it is beautiful, that Paul sings hymns, while here Peter was asleep. “And when he had considered, he came to the house of Mary,” etc. Then let us not hide God's marvels, but for our own good let us study to display these abroad for the edifying of the others. For as he deserves to be admired for choosing to be put into bonds, so is he worthy of more admiration, that he withdrew not until he had reported all to his friends. “And he said, Tell James and the brethren.” That they may rejoice: that they may not be anxious. Through these those learn, not those through him: such thought had he for the humbler part!—
Truly, nothing better than affliction not above measure (συμμέτρου). What think you must have been their state of mind— how full of delight! Where now are those women, who sleep the whole night through? Where are those men, who do not even turn themselves in their bed? Do you see the watchful soul? With women, and children, and maid-servants, they sang hymns to God, made purer than the sky by affliction. But now, if we see a little danger, we fall back. Nothing ever was more splendid than that Church. Let us imitate these, let us emulate them. Not for this was the night made, that we should sleep all through it and be idle. To this bear witness the artisans, the carriers, and the merchants (to this), the Church of God rising up in the midst of the night. Rise thou up also, and behold the quire of the stars, the deep silence, the profound repose: contemplate with awe the order (οἰκονομίαν) of your Master's household. Then is your soul purer: it is lighter, and subtler, and soaring disengaged: the darkness itself, the profound silence, are sufficient to lead you to compunction. And if also thou look to the heavens studded with its stars, as with ten thousand eyes, if you bethink you that all those multitudes who in the daytime are shouting, laughing, frisking, leaping, wronging, grasping, threatening, inflicting wrongs without number, lie all one as dead, you will condemn all the self-willedness of man. Sleep has invaded and defeated (ἡ λεγξεν) nature: it is the image of death, the image of the end of all things. If thou (look out of window and) lean over into the street, you will not hear even a sound: if you look into the house, you will see all lying as it were in a tomb. All this is enough to arouse the soul, and lead it to reflect on the end of all things.
Source: Homilies on Acts (New Advent)