Verses 1-4 See how little Christ values outward pomp, where there is not real purity of heart. He looks with pity upon the ruin of precious souls, and weeps over them, but we do not find him look with pity upon the ruin of a fine house. Let us then be reminded how needful it is for us to have a more lasting abode in heaven, and to be prepared for it by the influences of the Holy Spirit, sought in the earnest use of all the means of grace.
Verses 5-13 Our Lord Jesus, in reply to the disciples' question, does not so much satisfy their curiosity as direct their consciences. When many are deceived, we should thereby be awakened to look to ourselves. And the disciples of Christ, if it be not their own fault, may enjoy holy security and peace of mind, when all around is in disorder. But they must take heed that they are not drawn away from Christ and their duty to him, by the sufferings they will meet with for his sake. They shall be hated of all men: trouble enough! Yet the work they were called to should be carried on and prosper. Though they may be crushed and borne down, the gospel cannot be. The salvation promised is more than deliverance from evil, it is everlasting blessedness.
Verses 14-23 The Jews in rebelling against the Romans, and in persecuting the Christians, hastened their own ruin apace. Here we have a prediction of that ruin which came upon them within less than forty years after this. Such destruction and desolation, that the like cannot be found in any history. Promises of power to persevere, and cautions against falling away, well agree with each other. But the more we consider these things, the more we shall see abundant cause to flee without delay for refuge to Christ, and to renounce every earthly object, for the salvation of our souls.
Verses 24-27 The disciples had confounded the destruction of Jerusalem and the end of the world. This mistake Christ set right, and showed that the day of Christ's coming, and the day of judgment, shall be after that tribulation. Here he foretells the final dissolution of the present frame and fabric of the world. Also, the visible appearance of the Lord Jesus coming in the clouds, and the gathering together of all the elect to him.
Verses 28-37 We have the application of this prophetic sermon. As to the destruction of Jerusalem, expect it to come very shortly. As to the end of the world, do not inquire when it will come, for of that day and that hour knoweth no man. Christ, as God, could not be ignorant of anything; but the Divine wisdom which dwelt in our Saviour, communicated itself to his human soul according to the Divine pleasure. As to both, our duty is to watch and pray. Our Lord Jesus, when he ascended on high, left something for all his servants to do. We ought to be always upon our watch, in expectation of his return. This applies to Christ's coming to us at our death, as well as to the general judgment. We know not whether our Master will come in the days of youth, or middle age, or old age; but, as soon as we are born, we begin to die, and therefore we must expect death. Our great care must be, that, whenever our Lord comes, he may not find us secure, indulging in ease and sloth, mindless of our work and duty. He says to all, Watch, that you may be found in peace, without spot, and blameless.