It is commonly accepted that the gospels were written in the order of Mark, Matthew, Luke, and John. However, since the Greek church does not know how the gospel authors used the Old Testament scriptures, they do not understand that the writers had several purposes in writing: record fulfillment of prophecy, leave notes, for interested Greeks, to make tracing their exegesis possible, and record the teachings of apostles (which were done in Hebrew) for the Greeks in Greek.  The first purpose was to record what Jesus had done that fulfilled scriptures.