This book, written by one of Jesus's apostles, is addressed to believers who were in the area of Asia Minor. Today, this area is the heart of the Eastern Orthodox Church. At this point in history, however, the church was young. It wasn't wildly popular, and it was still growing. We open the book with the basics of evangelism: what we have been given from God, we have given to others. This is the way the church grew in the beginning, and it's the way it grows today.