For the Son of man shall come. The final judgment would put things in their true light—would show the value of self-sacrifice, would reveal the punishment of self-pleasing. Our Lord seems to refer to Daniel 7:13, as it were, in testimony to the truth of what he had just said.
Shall come; μέλλει ἔρχεσθαι: venturus est (Vulgate), is more than the bare announcement, and implies that it is in accordance with the eternal counsels of God that he should appear this second time.
In the glory of his Father. As one with the Father, and his Representative. So he speaks of "the glory which thou hast given me" (John 17:22). Reward; ἀποδώσει: render, reddet (Vulgate). The term includes punishment as well as recompense.
Works ( πρᾶξιν); doing, work. The word does not signify isolated acts, but general course of conduct, practice as a whole.