I say unto all, Watch - This command was proper, not only for those who were expecting the calamities that were soon to come upon the Jews, but for all who are soon to die and to go to the judgment. We know not the time of our death. We know not how soon we shall be called to the judgment. The Son of man may come at any moment, and we should therefore be ready. If we are his friends; if we have been renewed and pardoned; if we have repented of our sins, and have believed on him. and are leading a holy life, we "are" ready. If not, we are unprepared, and soon - probably while we are not expecting it - the cold hand of death will be laid on us, and we shall be hurried to the place where is weeping, and wailing, and gnashing of teeth. Oh how important it is to be ready, and to escape the awful sufferings of an eternal hell!

And what I say unto you,.... The four disciples, Peter, James, John, and Andrew; who came privately to him, and put to him the questions, which occasioned this long discourse; see Mark 13:3.
I say unto all. The Syriac and Persic versions read, "you all"; meaning all the rest of his apostles, and all his disciples and followers in Jerusalem, and in all Judea; who were all concerned in these things, and whom it became to
watch, and be upon their guard, and cast off all sloth and negligence; since they knew not soon the son of man would come, and all these evil things would be brought upon the Jewish nation, city, and temple: and the same exhortation is suitable to saints in all ages, times, and places, on account of the various snares, temptations, and evils, that they are liable to, the suddenness of death, and the uncertainty of the second coming of Christ.

And what I say unto you--this discourse, it will be remembered, was delivered in private.
I say unto all, Watch--anticipating and requiring the diffusion of His teaching by them among all His disciples, and its perpetuation through all time.

Watch. Observe in this chapter the emphasis given to Christ's exhortation, "Watch!" Matthew tells us how the Lord sought to impress these lessons of watchfulness and faithfulness still more deeply by the parables of the "Ten Virgins" (Matthew 25:1-13), and the "Talents" (Matthew. 25:14-30), and closed all with a picture of the awful day when the Son of man should separate all nations from one another, as the shepherd divideth his sheep from the goats (Matthew. 25:31-46).