This final book of the New Testament is a fitting conclusion to the sacred canon. It was written by John while exiled on the island of Patmos and is directed primarily to seven congregations in Asia Minor. Of course, the principles of John's visions and the unfolding themes give hope and comfort to all Christians.
John wrote the book during a time of great danger for the followers of Christ; hence, its message is largely expressed through symbols borrowed from the Old Testament. These symbols convey hope to the persecuted without increasing their risk.
The central message is one of victory. The Lamb will overcome all his enemies (e.g., the dragon, the beast, and the false prophet), and those who follow him will share in the victory on the day of Judgment (cf. 19:11-16).