When is a sequel, not a sequel?
What if Luke had really wanted to only write one long book, instead of the Part 1&2 of Luke-Acts? There were serious publishing restrictions on written works in the first century. A single book the length of Luke-Acts would be too long for standard scrolls and create problems for copyists. If it were really intended to be one book, then is it possible that it really has one plot, one theme, and a single central element. I want to propose that the focus is Church, with a capital ‘C.’
The center passage in a combined Luke-Acts is Acts 2:42-47, where we see the ideal first fellowship of Christians. They are gathered into ‘Church,’ in Jerusalem in the days that follow the Pentecost outpouring of the Holy Spirit. Like Adam and Eve in Paradise they live a short paragraph without sin. They do all the things that Church will do everywhere; they study, they pray, they live in community meeting the needs of the weakest among them, they witness by their simplicity and charity towards those outside the faith. Never again will a church be so purely Church.