I believe you could have , perhaps, noted the powerful involvement of ANGELS in the book of Acts. See passage list ANGELS in Acts. This shows how extensively God used ANGELS to help the proclamation of the Gospel from the beginning to the end of this book. I think it is a fulfillment of what Jesus said to Nathaniel in John 1:50-51. Nathaniel [as one of the TWELVE] would see THE SEED OF ABRAHAM established [with enablement by angels] in the book of Acts.