But ye, brethren, are not in darkness, that that day should overtake you as a thief - The allusion here is to the manner in which a thief or robber accomplishes his purpose. He comes in the night, when people are asleep. So, says the apostle, the Lord will come to the wicked. They are like those who are asleep when the thief comes upon them. But it is not so with Christians. They are, in relation to the coming of the day of the Lord, as people are who are awake when the robber comes. They could see his approach, and could prepare for it, so that it would not take them by surprise.

But ye, brethren, are not in darkness - Probably St. Paul refers to a notion that was very prevalent among the Jews, viz.: that God would judge the Gentiles in the night time, when utterly secure and careless; but he would judge the Jews in the day time, when employed in reading and performing the words of the law. The words in Midrash Tehillim, on Psalm 9:8, are the following: When the holy blessed God shall judge the Gentiles, it shall be in the night season, in which they shall be asleep in their transgressions; but when he shall judge the Israelites, it shall be in the day time, when they are occupied in the study of the law. This maxim the apostle appears to have in view in the 4th, 5th, 6th, 7th, and 8th verses. (1 Thessalonians 5:4-8)

But ye, brethren, are not in darkness,.... In a state of unregeneracy, which is a state of darkness, blindness, and ignorance, and which is the condition of all men by nature; they are born in darkness, and are brought up in it, and willingly, walk in it; they are covered with it, as the earth was covered with darkness in its first creation; and dwell in it, as the Egyptians did for some days, in thick darkness, darkness which might be felt; their understandings are darkened with respect to the true knowledge of God, the nature of sin, the way of salvation by Christ, the work of the spirit of God upon the soul, and the necessity of it, the Scriptures of truth, and the mysteries of the Gospel; and which is the case of God's elect themselves, while unregenerate: but now these persons were called out of darkness, turned from it, and delivered from the power of it; and therefore knew that the day of the Lord comes as above described, by the metaphors of a thief in the night, and a woman with child, and needed not to be informed about that matter: or

that that day should overtake you as a thief; or seize and lay hold upon you as a thief who comes in the dark, and lays hold upon a person suddenly; but these saints were not in the dark, but in the light, and so could see when the day of the Lord came; and would not be surprised with it, as a man is seized with terror and fright, when laid hold on by a thief; since they would be, or at least should be on their watch, and be looking out for, and hasting to the coming of the day of God.

Overtake (καταλάβῃ)

See on comprehended, John 1:5.

A thief (κλέπτης)

Tischendorf, Weiss, and Rev. T. retain this reading. Westcott and Hort read κλέπτας thieves, but with κλέπτης in margin. The weight of textual evidence is in favor of the singular.

{2} But ye, brethren, are not in darkness, that that day should overtake you as a thief.

(2) Returning to exhortations, he warns us who are enlightened with the knowledge of God, that it is our duty not to live securely in pleasures, lest we be suddenly taken in a dead sleep in pleasures. But contrary to this we are to have an eye to the Lord, and not allow ourselves to be oppressed with the cares of this world, for pleasures are fitting for the darkness of the night, and having an eye to the Lord is fitting for the light.

5:4 Ye, brethren, are not in darkness. The Christian has been fully instructed, is a child of the light, and knows that he must always be ready. He follows the Light of the World (Joh 8:12 9:5).

5:4 Ye are not in darkness - Sleeping secure in sin.

4. not in darkness-not in darkness of understanding (that is, spiritual ignorance) or of the moral nature (that is, a state of sin), Eph 4:18.

that-Greek, "in order that"; with God results are all purposed.

that day-Greek, "THE day"; the day of the Lord (Heb 10:25, "the day"), in contrast to "darkness."

overtake-unexpectedly (compare Joh 12:35).

as a thief-The two oldest manuscripts read, "as (the daylight overtakes) thieves" (Job 24:17). Old manuscripts and Vulgate read as English Version.

5:1-5 It is needless or useless to ask about the particular time of Christ's coming. Christ did not reveal this to the apostles. There are times and seasons for us to work in, and these are our duty and interest to know and observe; but as to the time when we must give up our account, we know it not, nor is it needful that we should. The coming of Christ will be a great surprise to men. Our Lord himself said so. As the hour of death is the same to each person that the judgment will be to mankind in general, so the same remarks answer for both. Christ's coming will be terrible to the ungodly. Their destruction will overtake them while they dream of happiness, and please themselves with vain amusements. There will be no means to escape the terror or the punishment of that day. This day will be a happy day to the righteous. They are not in darkness; they are the children of the light. It is the happy condition of all true Christians. But how many are speaking peace and safety to themselves, over whose heads utter destruction is hovering! Let us endeavour to awaken ourselves and each other, and guard against our spiritual enemies.