An exhortation to virtue— and particularly upon the passage, “God was walking in Paradise in the cool of the day:”— and again on the subject of abstaining from oaths.
You have lately heard, how all Scripture brings consolation and comfort, although it be an historical narrative. For instance, “In the beginning, God created the heaven and the earth,” was an historical declaration; but it was shown in our discourse, that this sentence was one pregnant with comfort; as, for example, that God made us a twofold table, by spreading out the sea and the land at the same time; by kindling above the twofold lights, the sun and moon; by determining the twofold seasons of their course, the day and night, the one for labour, and the other for rest. For the night ministers to us no less benefit than the day. But as I said with reference to trees, those which are barren, rival in their utility those which bear fruit; since we are thus not necessitated to touch those trees which are pleasant for food, for the purposes of building. The wild and untamed animals are also subservient to our need, in no less a degree than the tame animals; by driving us together, through the fear of them, into cities; making us more cautious, and binding us to one another; and by exercising the strength of some, and freeing others from their sicknesses; for the physicians concoct many medicines out of these; and by reminding us of our ancient sin. For when I hear it said, “The fear of you, and the dread of you, shall be upon all the wild beasts of the earth:” and then observe, that this honour was afterwards curtailed, I am reminded of sin, which has dissipated the fear of us, and undermined our authority. Thus I become a better and a wiser man, while I learn the harm that sin has occasioned us. As then, what I said was, that the things alluded to, and others of a similar kind, which God, who is the Maker, knows of, contribute not a little to our present life; so now also I say, that the night no less than the day brings along with it its advantage, being a rest from labours, and a medicine for disease. Often, indeed, physicians, though exerting themselves in many ways, and preparing an endless variety of remedies, are not able to deliver the man who is labouring under infirmity. But sleep coming upon him of its own accord has entirely removed the disease, and freed them from an infinite deal of trouble. Night, again, is not only a medicine for bodily labours, but also for mental diseases, in giving rest to anguished souls. Ofttimes it happens that some one has lost a son; and comforters without number have been of no avail to withdraw him from tears and groans. But on the approach of night, conquered by the despotic power of sleep, he has closed his eyelids in slumber, and received some small relief from the miseries of the day time.
Source: Homilies on the Statues (New Advent)