But you, brethren, are not in darkness, that that day should overtake you as a thief.
All Commentaries on 1 Thessalonians 5:4 Go To 1 Thessalonians 5
John Chrysostom
AD 407
Here he speaks of a life that is dark and impure. For it is just as corrupt and wicked men do all things as in the night, escaping the notice of all, and inclosing themselves in darkness. For tell me, does not the adulterer watch for the evening, and the thief for the night? Does not the violator of the tombs carry on all his trade in the night? What then? Does it not overtake them as a thief? Does it not come upon them also uncertainly, but do they know it beforehand? How then does he say, You have no need that anything be written unto you? He speaks here not with respect to the uncertainty, but with respect to the calamity, that is, it will not come as an evil to them. For it will come uncertainly indeed even to them, but it will involve them in no trouble. That that Day, he says, may not overtake you as a thief. For in the case of those who are watching and who are in the light, if there should be any entry of a robber, it can do them no harm: so also it is with those who live well. But those who are sleeping he will strip of everything, and go off; that is, those who are trusting in the things of this life.
