13:27-37 For they that dwell at Jerusalem, etc. Paul now recapitulates the facts of the Gospel, viz: (1) Christ rejected by the rulers; (2) the Scriptures that they read every Sabbath fulfilled by condemning him; (3) the demand upon Pilate to slay him, when he had declared there was no cause of death; (4) the Scriptures fulfilled in his death; (5) the abundantly attested resurrection; (6) he declares that the promise made the fathers was now fulfilled to their children. See, for example, Ge 12:3 22:18.
13:31 He was seen many days by them who came up with him from Galilee to Jerusalem - This last journey both presupposes all the rest, and was the most important of all.
13:14-31 When we come together to worship God, we must do it, not only by prayer and praise, but by the reading and hearing of the word of God. The bare reading of the Scriptures in public assemblies is not enough; they should be expounded, and the people exhorted out of them. This is helping people in doing that which is necessary to make the word profitable, to apply it to themselves. Every thing is touched upon in this sermon, which might best prevail with Jews to receive and embrace Christ as the promised Messiah. And every view, however short or faint, of the Lord's dealings with his church, reminds us of his mercy and long-suffering, and of man's ingratitude and perverseness. Paul passes from David to the Son of David, and shows that this Jesus is his promised Seed; a Saviour to do that for them, which the judges of old could not do, to save them from their sins, their worst enemies. When the apostles preached Christ as the Saviour, they were so far from concealing his death, that they always preached Christ crucified. Our complete separation from sin, is represented by our being buried with Christ. But he rose again from the dead, and saw no corruption: this was the great truth to be preached.