Sources for the historicity of Jesus and actions attributed to him. Three of these (Matthew, Mark, and Luke) are known as the synoptic Gospels, from the Greek σύν (syn "together") and ὄψις (opsis "view"), given that they display a high degree of similarity in content, narrative arrangement, language and paragraph structure. The presentation in the fourth canonical gospel, i.e. John, differs from these three in that it has more of a thematic nature rather than a narrative format. Scholars generally agree that it is impossible to find any direct literary relationship between the synoptic gospels and the Gospel of John. The authors of the New Testament
New Testament apocrypha and produce new translations. The texts of the Nag Hammadi library are often considered separately but the current edition of Schneemelcher also contains eleven Nag Hammadi texts. Books that are known objectively not to have existed in antiquity are usually not considered part of the New Testament Apocrypha. Among these are the Libellus de Nativitate Sanctae Mariae (also called the "Nativity of Mary") and the Latin Infancy gospel. The latter two did not exist in antiquity, and they seem to be based on the earlier Infancy gospels. Four gospels came to be accepted as part of the New Testament canon.