The gospels are not biographical in the modern sense; they give no information about Jesus' human personality or the events of his adult life before his baptism by John. But they do resemble some of the Lives written in the Graeco-Roman world e.g. Philo's Life of Moses. Like them, the gospels aim to give credibility within a piece of history to the figure who is the principal subject of the biography, and the infancy narratives of Matthew and Luke and other references to Jesus' family (Mark 3: 31–5) do align the gospels to those ancient biographies where the subject's early years are mentioned to portend his future destiny.