Final answer:
The claim that John used the Greco-Roman greeting 'Chairein' in the introduction to the Book of Revelation is false. Revelation employs a variety of symbols and allusions to the Greco-Roman world to communicate its message effectively.
Step-by-step explanation:
The statement that John uses the typical Greco-Roman greeting, Chairein, "to rejoice" in his introduction to the Book of Revelation is False. The Book of Revelation, or Apocalypse, does contain various allusions to Greco-Roman culture and customs due to the Hellenized context in which the Christian faith spread, but the greeting 'Chairein' is not explicitly used in the text. It's important to consider the rich symbolic language and imagery used in Revelation, such as the Maiestas Domini (Christ in Majesty) and depictions of Christ similar to those found in Roman art, which help to assert the authority of Christ in a manner that would be culturally relevant to contemporary audiences.