The city's fall, then, was the initial stage of a process, the duration of which is undefined here, but implied to be considerable, and of which the closing stage is the personal coming of Jesus. The same conclusion is supported by verse 28, which treats that fall as the beginning of the fulfilment of the prophecy.
III. That verse forms a transition to the section containing the illustrative parable and the reiteration of the assurance that Christ's words would certainly be fulfilled. The disciples might naturally quake at the prospect, and wonder how they could face the reality. Jesus gives them strong words of cheer, which apply to all dreaded contingencies and to all social convulsions. What is a messenger of destruction to Christless men and institutions is a harbinger of full 'redemption' to His servants. Earthquakes but open their prison doors and loose their bands, they should not shake their hearts.
Historically the fall of Jerusalem was a powerful factor in the deliverance of the Church from Jewish swaddling-bands which hampered its growing limbs. For all Christians the destruction of what can perish brings fuller vision and possession of what cannot be shaken. To Christ's friends, all things work for good. So the parable which at first sight seems strangely incongruous becomes blessedly significant and fitting. The gladsome blossoming of the trees, the herald of the glories of summer, is a strange emblem of such a tragedy, and summer itself is a still stranger one of that solemn last judgment. But the might of humble trust in Him who comes to judge makes His coming summer-like in the light and warmth with which it floods the soul, and the rich fruitage which it produces there.
Observe, too, that the parable confirms the idea of a process having stages, for the lesson of the blossoming fig-tree is not that summer has come, but that it is nigh.
The solemn assurance in verse 32, made more weighty by the 'Verily I say,' seems at first sight to bring the final judgment within the lifetime of the generation of the hearers. But it is noteworthy that the expression 'till all things are fulfilled' is almost verbally identical with that in verse 22, which refers only to the destruction of Jerusalem, and is therefore most naturally interpreted as having the same restricted application here. The difference between the two phrases is significant, since in the former the certainty of fulfilment is deduced from the fact of 'the things' being written—that is, they must be accomplished because they have been foretold in Scripture,—whereas in the latter Christ rests the certainty of fulfilment on His own word. That majestic assurance in verse 33 comes well from His lips, and makes claim that His word shall outlast the whole present material order, and be fulfilled in every detail. Think of a mere man saying that!
IV. Exhortations corresponding to the predictions follow. Christ's revelation of the future was neither meant to gratify idle curiosity nor to supply a timetable in advance, but to minister encouragement and to lead to watchfulness. Whether 'that day' (ver. 34) is understood of the fall of Jerusalem or of the final coming of the Lord, it will come 'as a snare' upon men who are absorbed with the earth which they inhabit. They will be captured by it, as a covey of birds in a field busily picking up grain, are netted by one sudden fling of the fowler's net. A wary eye would have saved them.
The exhortation is as applicable to us, for, whatever are our views about unfulfilled prophecy, death comes to us all at a time which we know not, as the Book of Ecclesiastes, using the same figure, says; 'Man knoweth not his time … as the birds that are caught in the snare.' Hearts must be kept above the grosser satisfactions of sense and the less gross cares of life, being neither stupefied with gorging earth's good, nor preoccupied with its gnawing anxieties, both of which are destructive of the clear realisation of the certain future. We are to preserve an attitude of wakefulness and of expectancy, and, as the sure way to it, and to clearing our hearts of perishable delights and shortsighted, self-consuming cares, we are to keep them in a continual posture of supplication. If our study of unfulfilled prophecy does that for us, it will have done what Jesus means it to do; if it does not it matters little what theories about its chronology we may adopt.
The two stages which we have tried to point out in this passage are clearly marked at the close, where escaping 'all these things that shall come to pass' and standing 'before the Son of man' are distinguished. True, both stages were to be included in the experience of Christ's hearers, but they are none the less separate stages.
Luke's version of this great discourse gives less prominence to the final coming than does Matthew's, and does not blend the two stages so inextricably together; but it gives no hint of the duration of the 'times of the Gentiles,' and might well leave the impression that these were brief. Now in this close setting together of a nearer and a much more remote future, with little prominence given to the interval between, our Lord is but bringing His prophecy into line with the constant manner of the older prophets. They and He paint the future in perspective, and the distance, seen behind the foreground, seems nearer than it really is. The spectator does not know how many weary miles have to be traversed before the distant blue hills are to be reached, nor what deep gorges lie between.
Such bringing together of events far apart in time of fulfilment rests in part on the fact that there have been many 'days of the Lord,' many 'comings of Christ,' each of which is a result on a small scale of the same retributive action of the Judge of all, as shall be manifested on the largest scale in the last and greatest day of the Lord. Therefore the true use of all these predictions is that which Christ enforces here; namely, that they should lead us to prayerful watchfulness and to living above earth, its goods and cares.