The simplest is that each Gospel was written for the benefit of a different set of people. Under this scenario Matthew was written for the Jews, Mark was written for the Romans, Luke was written for the Greeks and John was written for all men. At first glance there are characteristics of these books that support the analysis. Matthew is full of Old Testament quotes which would presumably appeal to those that owned the Old Testament Mark has a forthright, active and brief style which would appeal to the Roman mind. The Greeks were renowned for culture and science and Luke the physician, has a gospel of detail and with songs and hymns. Finally John comes along with the global or encompassing Gospel. Due to their strong resemblance and how each of them shaped their gospel, Mark, Matthew, and Luke are usually referred to as the “Synoptic Gospels.”
The earliest book Mark, emphasized Jesus the sufferer; Matthew, Jesus the teacher; in Luke, Jesus the reconciler. In contrast to these descriptions is John’s innovative example of a biography meant to correct a particular early Christian community’s misunderstanding of Christ. John structures his narrative order differently than the other three gospels. It appears that the purpose of John’s gospel was to reveal Christ’s nature and character. Additionally and unique to John’s gospel he omits the account of Jesus’ birth in favor of rendering Him as the personal, historical manifestation of the Logos or Diving Word. John saw Jesus as mystic!