For the Son of Man is going to come with his angels in the glory of his Father, and then he will repay each person according to what he has done.
27. For the Son of man will come. That the doctrine which has just been laid down may more deeply affect our minds, Christ places before our eyes the future judgment; for if we would perceive the worthlessness of this fading life, we must be deeply affected by the view of the heavenly life.
Christ showed He must suffer; now He shows His disciples must suffer too, and willingly. A true disciple comes after Him as sheep after shepherd, soldiers after captain, not one who prescribes to Him as Peter just did. This is a deliberate choice and cheerful resolution, not accident or another's will.
AI summary
Commenting on Matthew 16:24-28
Verse 27. For the Son of man, etc. That is, the Lord Jesus Christ shall return to judge the world. He will come in glory--the glory of his Father--the majesty with which God is accustomed to appear, and which befits God. He will be attended by angels. He will judge all men. Reward. The word reward means recompense, or do justice to.