For you yourselves know perfectly that the day of the Lord so comes as a thief in the night.
Read Chapter 5
Augustine of Hippo
AD 430
So what is this day which the Lord has made? Live good lives, and you will be this day yourselves. The apostle, you see, was not talking about the day which begins with sunrise and ends with sunset, when he said, “Let us walk honorably, as in the day”; where he also said, “For those who get drunk are drunk at night.” Nobody sees people getting drunk at the midday meal; but when this does happen, it is a matter of the night, not of the day which the Lord has made. You see, just as that day is realized in those who live godly, holy and righteous lives, marked by moderation, justice, sobriety. So too on the contrary, for those who live in an ungodly, looseliving, proud and irreligious manner—for that sort of night, the night will undoubtedly be a thief. “The day of the Lord will come just like a thief in the night.” ..
The apostle says: "The day of the Lord shall so come as a thief in the night. When they shall say, Peace and security, then on them shall come sudden destruction."
Hear Paul saying, For yourselves know perfectly that the day of the Lord so comes as a thief in the night. Not the general day only, but that of every individual. For the one resembles the other, is also akin to it. For what the one does collectively, that the other does partially. For the period of consummation took its beginning from Adam, and then is the end of the consummation; since even now one would not err in calling it a consummation. For when ten thousand die every day, and all await That Day, and no one is raised before it, is it not the work of That Day? And if you would know on what account it is concealed, and why it so comes as a thief in the night, I will tell you how I think I can well account for it. No one would have ever cultivated virtue during his whole life; but knowing his last day, and, after having committed numberless sins, then having come to the Laver, he would so have departed. For if now, when the fear arising from its uncertainty shakes the souls of all,...
Do not place your confidence in your youth, nor think that you have a very fixed term of life, “For the day of the Lord comes as a thief in the night.” On this account he has made our end invisible, so that we might demonstrate clearly our diligence and forethought. Do you not see men taken away prematurely day after day? On this account a certain one admonishes, “don’t delay in turning to the Lord, and don’t put things off from day to day,” lest at any time, while you delay, you are destroyed. Let the old man keep this admonition; let the young man heed this advice. Indeed, are you in insecurity, and are you rich, and do you abound in wealth, and does no affliction happen to you? Still hear what Paul says: “when they say peace and safety, then sudden destruction comes upon them.” Affairs change often. We are not masters of our end. Let us be masters of virtue. Our Master Christ is loving.
