An essential work to understand each one of the prophecies related by the Seer of Patmos in the Book of Revelations or the Revelation of St. John. This enigmatic book which seals the Bible, has been analyzed by restless minds giving different interpretations to each one of its paragraphs. Finally, and thanks to the Donum Dei –gift of God– with which the Avatar of this Age was bestowed, the reader will be able to know the truth that this book encloses.