The last book of the New Testament is the record of the revelation that the apostle John received during his imprisonment on the island of Patmos for being a Christian (Revelation 1:9 and following). Many of the chapters of this book are difficult to interpret. Some of the greatest theologians in the history of the Church have felt unequal to the task of expounding these Scriptures. For example, John Calvin, one of the great reformers, wrote a commentary on every book of the Bible except Revelation. Despite the fact that the meaning of every part of this book may not be immediately apparent, there is the promise that those who read (not necessarily understand) it will be blessed (Revelation 1:3). Though some parts may be obscure, certain ideas do stand out with unquestioned clarity. Chapters 1 through 3 describe Jesus as he appeared to John and record the messages to be sent to the seven churches of Asia Minor. These messages are quite clear in their meaning. Chapters 4 through 18 are more difficult, but chapters 19 through 22, which concern those events by which God brings final redemption to the world, are clear for the most part. These four chapters are extremely important to completing the history of redemption outlined since Genesis.