Verse 27 confirms all the preceding by the solemn announcement of the coming of the Son of Man as Judge. Mark the dignity of the words. He is to come 'in the glory of the Father.' That ineffable and inaccessible light which rays forth from the Father enwraps the Son. Their glory is one. The waiting angels are 'His.' He renders to every man according to his doing (his actions considered as one whole). Thus He claims for Himself universal sway, and the power of accurately determining the whole moral character of every life, as well as that of awarding precisely graduated retribution. They surely shall then find their lives who have followed Him here.
Verse 28 adds, with His solemn 'verily,' a confirmation of this announcement of His coming to judge. The question of what event is referred to may best be answered by noting that it must be one sufficiently far off from the moment of speaking to allow of the death of the greater number of His hearers, and sufficiently near to allow of the survival of some; that it must also be an event, after which these survivors would go the common road into the grave; that it is apparently distinguished from His coming 'in the glory of the Father,' and yet is of such a nature as to afford convincing proof of the establishment of His kingdom on earth, and to be, in some sort, a sign of that final act of judgment. All these requirements (and they are all the fair inferences from the words) meet only in the destruction of Jerusalem, and of the national life of the chosen people. That was a crash of which we faintly realise the tremendous significance. It swept away the last remnant of the hope that Israel was to be the kingdom of the Messiah; and from out of the dust and chaos of that fall the Christian Church emerged, manifestly destined for world-wide extension. It was a 'great and terrible day of the Lord,' and, as such, was a precursor and a prophecy of the day of the Lord, when He 'shall come in the glory of the Father,' and 'render unto every man according to his deeds.'