Simplify the following text for a Grade 7 native English-speaking person.
Original: In the Gospel of John and in Revelation , Jesus is referred to as `` the Word of God '' , although the context in Revelation is very different from John .
Simplified: There is some disagreement over whether the John who wrote the letters of John , the John who wrote The Gospel of John , and the John who wrote the Book of Revelation are the same person . The person writing Revelation called himself `` John '' .