The Book of Acts is not written for the purpose of spreading Doctrine, although there is Doctrine in it.
Some have said that it should have been called: “The Acts of the Holy Spirit.” Still some have said that it would be equally proper if it carried the title: “Acts of the Disciples”. I would not object if it was called: The Holy Spirit Unleashed! What we see in this Book is the ministering work of the Holy Spirit of God working through the Disciples and God putting His hand of blessing on the one that would technically replace Judas Iscariot. Several most exciting verses appear in chapter 1, verse 7, 8. Jesus answers a question about when He would restore the kingdom to Israel… “It is not for you to know the times or dates the Father has set by His own authority. But you will receive power when the Holy Spirit comes on you; and you will be my witnesses in Jerusalem, and in all Judea and Samaria, and to the ends of the earth.”
Chapter 2 of Acts tells of the Holy Spirit descending upon them on the day of Pentecost, thus the fulfilling of that promise. While some made fun of HIS ministry at that moment, Peter clarified the matter, explaining what had been predicted by the prophet Joel.
From that point, in the Book of Acts, we see the Holy Spirit empowering not only the disciples that Christ had chosen, but others also. The ministry of Paul was established and accepted, and the church exploded to fulfill that 8th verse … “Jerusalem, Judea and Samaria, and to the ends of the earth.”
From this point on, the Holy Spirit of God reveals His uniqueness by equipping the disciples, and others, in a variety of ways to spread the WORD to the World. Did every disciple have all the same gifts? No! The Book of Acts, along with other Books of the Bible shows different acts being performed by different disciples. The single repeated act is distinctive of all of them; they were endowed with the Holy Spirit. God does not want me to be a Paul, just Ted. If I falter, and I do too often, seek forgiveness and move on. No labor is in vain when done for Him under the leadership of the Holy Spirit.