Nothing will persuade the deconstructionists as to the authenticity of the Gospels. However, for us Catholics, there is sufficient proof of authorship in the Book of Revelation. In Ch. 4 0f Revelation, St. John describes his mystical visions of the four living creatures around the throne, one with the face of a lion, one with the face of a calf, one with the face of a man, and lastly one with the face of an eagle. These are the four authors of the Gospels. The first one mentioned, the lion, represents St. Mark, the author of the first Gospel. Mark's Gospel is represented by the lion, because his Gospel focuses on the power of Jesus. The calf is St. Luke, whose Gospel deals more fully with sacrifice. The man is St. Matthew, whose Gospel focuses more on the humanity of Jesus, While St. John's Gospel 'soars like an eagle' to mystical heights that are not present in the synoptic Gospels. The order in which the four creatures are presented in Revelation also denotes the order in which the four Gospels were written. For us Catholics, no further proof than this is necessary.