The book of Acts traces the history of the early church and ho the Holy Spirit inspired the disciples to expand the Chruch world-wide! The former treatise—The Gospel according to Luke, which is here most evidently intended. O Theophilus—See the note on Luke 1:3. To do and teach—These two words comprise his miracles and sermons. This introduction seems to intimate that, as he had already in his Gospel given an account of the life and actions of our Lord, so in this second treatise he was about to give an account of the lives and acts of some of the chief apostles, such as Peter and Paul. Acts 1:2 After that he, through the Holy Ghost, etc.—This clause has been variously translated: the simple meaning seems to be this—that Christ communicated the Holy Spirit to his disciples, after his resurrection, as he had not done before. In Luke 24:45, it is said that he opened their understanding, that they might understand the Scriptures; and in John 20:22, that he breathed on them, and said, receive ye the Holy Ghost. Previously to this, we may suppose that the disciples were only on particular occasions made partakers of the Holy Spirit; but from this time, it is probable that they had a measure of this supernatural light and power constantly resident in them. By this they were not only able to proclaim the truth, but to discern the meaning of all the Old Testament Scriptures which referred to Christ; and to appoint whatever rites or ordinances were necessary for the establishment of his Church. There were many things which the apostles said, did, and decreed, for which they had no verbal instructions from our Lord, at least, none that are recorded in the Gospels; we may therefore conclude that these were suggested to them by that Holy Spirit which now became resident in them, and that it is to this that St. Luke refers in this verse, After that he, through the Holy Ghost, had given commandments unto the apostles. Acts 1:3