Acts 1:8

ye shall receive power Something different from the profitless speculations to which they had just desired an answer, even "a mouth and wisdom which their adversaries could neither gainsay nor resist" (Luke 21:15). Thus would they be enabled to become Christ's witnesses.

in Jerusalem, and in all Judea To which district all the ministrations of the Apostles were confined till the death of Stephen.

and in Samaria Whither the first who went with authority was Philip, one of the seven (Acts 8:5), and afterwards Peter and John.

and unto the uttermost part of the earth Commenced by the preaching of Paul, Barnabas, Mark, Silas and Timothy, and regarded as placed on a secure footing when St Paul was once brought into the capital city of the world.

The writer keeps before him from first to last the promise contained in this verse, and leaves out of his narrative all that does not tend to illustrate its fulfilment. The work of every agent is followed so far as he is used to bring about this result and no farther. This will be noticed at each stage as we proceed, and it will be seen that it explains why among "Acts of Apostles" some works are included which were not carried on by Apostles, and why the histories of the chief agents are left incomplete.