The Diatessaron (160 - 175 A.D.) is the most well-known harmony of the gospels. It was composed by Tatian, an Assyrian, who was an early Christian apologist and ascetic. Tatian combined the textual material from the four gospels-Matthew, Mark, Luke, and John-into one coherent narrative on Jesus's life and death. In contrast to later attempts, Tatian appears to have made no effort to gloss over apparent inconsistencies between the texts. Originally...