Acts is one of the most exciting books of the Bible - full of action, ideas, and conflict. The central concern of the book of Acts is expressed in the promise the Lord Jesus gave to His disciples at the very beginning of the book, “You shall receive power.” Acts teaches us plainly that our mission is not only local but global in scope. The disciples were witnesses in Jerusalem, Judea, and the uttermost parts of the earth. All throughout the book of Acts, men boldly proclaimed the gospel by the power of the Holy Spirit.