In these words observe,

I.The apostle tells the Thessalonians it was needless or useless to enquire about the particular time of Christ's coming: Of the times and seasons you need not that I write unto you, Th1 5:1. The thing is certain that Christ will come, and there is a certain time appointed for his coming; but there was no need that the apostle should write about this, and therefore he had no revelation given him; nor should they or we enquire into this secret, which the Father has reserved in his own power. Of that day and hour knoweth no man. Christ himself did not reveal this while upon earth; it was not in his commission as the great prophet of the church: nor did he reveal this to his apostles; there was no need of this. There are times and seasons for us to do our work in: these it is our duty and interest to know and observe; but the time and season when we must give up our account we know not, nor is it needful that we should know them. Note, There are many things which our vain curiosity desires to know which there is no necessity at all of our knowing, nor would our knowledge of them do us good.

II.He tells them that the coming of Christ would be sudden, and a great surprise to most men, Th1 5:2. And this is what they knew perfectly, or might know, because our Lord himself had so said: In such an hour as you think not, the Son of man cometh, Mat 24:44. So Mar 13:35, Mar 13:36, Watch you therefore, for you know not when the master of the house cometh; lest, coming suddenly, he find you sleeping. And no doubt the apostle had told them, as of the coming of Christ, so also of his coming suddenly, which is the meaning of his coming as a thief in the night, Rev 16:15. As the thief usually cometh in the dead time of the night, when he is least expected, such a surprise will the day of the Lord be; so sudden and surprising will be his appearance. The knowledge of this will be more useful than to know the exact time, because this should awaken us to stand upon our watch, that we may be ready whenever he cometh.

III.He tells them how terrible Christ's coming would be to the ungodly, Th1 5:3. It will be to their destruction in that day of the Lord. The righteous God will bring ruin upon his and his people's enemies; and this their destruction, as it will be total and final, so, 1. It will be sudden. It will overtake them, and fall upon them, in the midst of their carnal security and jollity, when they say in their hearts, Peace and safety, when they dream of felicity and please themselves with vain amusements of their fancies or their senses, and think not of it, - as travail cometh upon a woman with child, at the set time indeed, but not perhaps just then expected, nor greatly feared. 2. It will be unavoidable destruction too: They shall not escape; they shall in no wise escape. There will be no means possible for them to avoid the terror nor the punishment of that day. There will be no place where the workers of iniquity shall be able to hide themselves, no shelter from the storm, nor shadow from the burning heat that shall consume the wicked.

IV.He tells them how comfortable this day will be to the righteous, Th1 5:4, Th1 5:5. Here observe, 1. Their character and privilege. They are not in darkness; they are the children of the light, etc. This was the happy condition of the Thessalonians as it is of all true Christians. They were not in a state of sin and ignorance as the heathen world. They were some time darkness, but were made light in the Lord. They were favoured with the divine revelation of things that are unseen and eternal, particularly concerning the coming of Christ, and the consequences thereof. They were the children of the day, for the day-star had risen upon them; yea, the Sun of righteousness had arisen on them with healing under his wings. They were no longer under the darkness of heathenism, nor under the shadows of the law, but under the gospel, which brings life and immortality to light. Ti2 1:10. 2. Their great advantage on this account: that that day should not overtake them as a thief, Th1 5:4. It was at least their own fault if they were surprised by that day. They had fair warning, and sufficient helps to provide against that day, and might hope to stand with comfort and confidence before the Son of man. This would be a time of refreshing to them from the presence of the Lord, who to those that look for him will appear without sin unto their salvation, and will come to them as a friend in the day, not as a thief in the night.

For when they shall say, Peace and safety - This points out, very particularly, the state of the Jewish people when the Romans came against them; and so fully persuaded were they that God would not deliver the city and temple to their enemies, that they refused every overture that was made to them.

Sudden destruction - In the storming of their city and the burning of their temple, and the massacre of several hundreds of thousands of themselves; the rest being sold for slaves, and the whole of them dispersed over the face of the earth.

As travail upon a woman - This figure is perfectly consistent with what the apostle had said before, viz.: that the times and seasons were not known: though the thing itself was expected, our Lord having predicted it in the most positive manner. So, a woman with child knows that, if she be spared, she will have a bearing time; but the week, the day, the hour, she cannot tell. In a great majority of cases the time is accelerated or retarded much before or beyond the time that the woman expected; so, with respect to the Jews, neither the day, week, month, nor year was known. All that was specifically known was this: their destruction was coming, and it should be sudden, and they should not escape.

For when they shall say,.... Or men shall say, that is, wicked and ungodly men, persons in a state of unregeneracy:

peace and safety; when they shall sing a requiem, to themselves, promise themselves much ease and peace for years to come, and imagine their persons and property to be very secure from enemies and oppressors, and shall flatter themselves with much and long temporal happiness:

then sudden destruction cometh upon them; as on the men of the old world in the times of Noah, and on the inhabitants of Sodom and Gomorrah in the days of Lot; for as these, will be the days of the Son of man, as at the time of the destruction of Jerusalem, so at the last day; see Luk 17:26 and as was the destruction of literal Babylon, so of Babylon in a mystical sense, or antichrist and his followers: and which will be

as travail upon a woman with child; whose anguish and pains are very sharp, the cause of which is within herself, and which come suddenly upon her, and are unavoidable; and so the metaphor expresses the sharpness and severity of the destruction of the wicked, thus the calamities on the Jewish nation are expressed by a word which signifies the sorrows, pangs, and birth throes of a woman in travail, Mat 24:8, and likewise that the cause of it is from themselves, their own sins and transgressions; and also the suddenness of it, which will come upon them in the midst of all their mirth, jollity, and security; and moreover, the inevitableness of it, it will certainly come at the full and appointed time, though that is not known:

and they shall not escape; the righteous judgment of God, the wrath of the Lamb, or falling into his hands; to escape is impossible, rocks, hills, and mountains will not cover and hide them; before the judgment seat of Christ they must stand, and into everlasting punishment must they go.

they--the men of the world. Th1 5:5-6; Th1 4:13, "others," all the rest of the world save Christians.

Peace-- (Jdg 18:7, Jdg 18:9, Jdg 18:27-28; Jer 6:14; Eze 13:10).

then--at the very moment when they least expect it. Compare the case of Belshazzar, Dan 5:1-6, Dan 5:9, Dan 5:26-28; Herod, Act 12:21-23.

sudden--"unawares" (Luk 21:34).

as travail--"As the labor pang" comes in an instant on the woman when otherwise engaged (Psa 48:6; Isa 13:8).

shall not escape--Greek, "shall not at all escape." Another awful feature of their ruin: there shall be then no possibility of shunning it however they desire it (Amo 9:2-3; Rev 6:15-16).