Synopsis of the Books of the Bible, by John Nelson Darby, [1857-62], at sacred-texts.com
The Lord's discourse in chapter 21 displays the character of the Gospel in a peculiar manner. The spirit of grace, in contrast with the Judaic spirit, is seen in the account of the poor widow's offering. But the Lord's prophecy requires more detailed notice. Verse 6 (Luk 21:9), as we saw at the end of chapter 19, speaks only of the destruction of Jerusalem as she then stood. This is true also of the disciples' question. They say nothing of the end of the age. The Lord afterwards enters upon the duties and the circumstances of His disciples previous to that hour. In Verse 8 (Luk 21:8) it is said, "The time draweth near," which is not found in Matthew. He goes much more into detail with regard to their ministry during that period, encourages them, promises them necessary help. Persecution should turn to them for a testimony. From the middle of Verse 11 to the end of Verse 19 (Luk 21:11-19) we have details relative to His disciples, that are not found in the corresponding passage of Matthew. They present the general state of things in the same sense, adding the condition of the Jews, of those especially who, more or less, professedly received the word. The whole stream of testimony, as rendered in connection with Israel, but extending to the nations, is found in Matthew to the end of Verse 14 (Luk 21:14). In Luke it is the coming service of the disciples, until the moment when the judgment of God should put an end to that which was virtually terminated by the rejection of Christ. Consequently the Lord says nothing in Verse 20 (Luk 21:20) of the abomination of desolation spoken of by Daniel, but gives the fact of the siege of Jerusalem, and its then approaching desolation not the end of the age, as in Matthew. These were the days of vengeance on the Jews, who had crowned their rebellion by rejecting the Lord. Therefore Jerusalem should be trodden down by the Gentiles, until the times of the Gentiles were fulfilled, that is, the times destined to the sovereignty of the Gentile empires according to the counsel of God revealed in the prophecies of Daniel. This is the period in which we now live. There is a break here in the discourse. Its principal subject is ended; but there are still some events of the last scene to be revealed, which close the history of this Gentile supremacy.
We shall see also that, although it is the commencement of the judgment, from which Jerusalem will not arise until all is accomplished and the song of Isaiah 40 is addressed to her, nevertheless, the great tribulation is not mentioned here. There is great distress, and wrath upon the people, as was indeed the case in the siege of Jerusalem by Titus; and the Jews were also led away captive. Neither is it said, "Immediately after the tribulation of those days." Nevertheless, without designating the epoch, but after having spoken of the times of the Gentiles, the end of the age comes. There are signs in heaven, distress on earth, a mighty movement in the waves of human population. The heart of man, moved by a prophetic alarm, foresees the calamities which, still unknown, are threatening him; for all the influences that govern men are shaken. Then shall they see the Son of man, once rejected from the earth, coming from heaven with the ensigns of Jehovah, with power and great glory the Son of man, of whom this Gospel has always spoken. There the prophecy ends. We have not here the gathering together of the elect Israelites, who had been dispersed, of which Matthew speaks.
That which follows consists of exhortations, in order that the day of distress may be a token of deliverance to the faith of those who, trusting in the Lord, obey the voice of His servant. The "generation" (a word already explained when considering Matthew) should not pass away till all was fulfilled. The length of the time that has elapsed since then, and that must elapse until the end, is left in darkness. Heavenly things are not measured by dates. Moreover that moment is hidden in the knowledge of the Father. Still heaven and earth should pass away, but not the words of Jesus. He then tells them that, as dwelling on earth, they must be watchful, lest their own hearts should be overcharged with things that would sink them into this world, in the midst of which they were to be witnesses. For that day would come as a snare upon all those who had their dwelling here, who were rooted here. They were to watch and pray, in order to escape all those things, and to stand in the presence of the Son of man. This is still the great subject of our Gospel. To be with Him, as those who have escaped from the earth, to be among the 144,000 on Mount Zion, will be an accomplishment of this blessing, but the place is not named; so that, supposing the faithfulness of those whom He was personally addressing, the hope awakened by His words would be fulfilled in a more excellent manner in His heavenly presence in the day of glory.