30 For two whole years Paul stayed there in his own rented house and welcomed all who came to see him. 31 He proclaimed the kingdom of God and taught about the Lord Jesus Christ—with all boldness and without hindrance! Acts 28:30-31
Thus ends the Book of Acts. Paul seemed to be under house arrest but was allowed visitors. It was an unusual setting to be sure. He had nothing holding him back so he preached and taught. It was what he was born to do. He knew it and those who came in contact with him also knew it.
It was merely the beginning of the Church as we know it today. Through the early years, the Church exploded in growth. It wasn’t a mature church in the least. Paul’s letters to the churches were timely lessons and instructions for the Believers. None of them knew how to act and think as new Believers, which is why Paul wrote what he wrote.
Fortunately his letters are as timely today in a mature church setting as they were in the Early Church.
If you’re able to go back through the Book of Acts, please do so. It will enhance what you’ve already read by reading it in one or two sittings. There are a lot of great takeaways in this book.