On the day appointed by the Jews themselves, not only the more prominent men, but very many others came to the Apostle at his lodging, or to the room he occupied separately (v. 16). On this occasion the Apostle spent the whole day, from morning until evening, setting forth Christian teaching to them. First, he explained the teaching concerning the Kingdom of God, that is, the founding and establishment on earth of God's Kingdom by the Messiah who had come, the Lord Jesus Christ. This exposition probably consisted in a detailed account of the Gospel history: the life, teaching, and works of the Lord, His sufferings, death, Resurrection, and Ascension. Second, he brought forward testimonies from the Law of Moses and the Prophets, persuading them concerning Jesus. By comparing Old Testament prophecies about the Messiah with events from the life of the Lord Jesus, he showed that this very Jesus of Nazareth is the Messiah promised and foretold in the Old Testament (cf. Acts 17:3).