The life of St Mary of Egypt is real history, and every word of it is true, how never it has striking parallels and important differences with the parable of the prodigal son. Why do we tell and hear parables? In order to improve! We have much to get better at, and the life of St. Mary gives us great encouragement and a great rebuke. We tell it in the context of the parable of the prodigal son, so that we can get better.