The title, Rediscovered Joy, derives from Galatians 4:15 (NLT). The Galatians had lost the joy of God's blessing because they had departed from the truths of the gospel.
The Reformation - and the book - is an invitation to rediscover the joy of the gospel. Despite the common claim that the Reformation is either out-dated or divisive, its rediscovery of the apostolic message was a rediscovery of joy - a message that is as relevant today as it was 500 years ago and 2,000 years ago.