"But you will receive power when the Holy Spirit has come upon you, and you will be my witnesses in Jerusalem and in all Judea and Samaria, and to the end of the earth."
Acts 1:8
See: Notes on Acts by Thomas L. Constable
Publisher: Constable's Bible Study Notes
See Sermon: The Apostles' Creed (Part 7) - He Ascended to Heaven, and Sits on the Right Hand of the Father by Matt Chandler
Publisher: The Village Church
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