St Peter Chrysologus on the Parable of the Mustard Seed Details of event: Bishop Conlon explains the Sermon of St Peter Chryologus on the Parable of the Mustard Seed. In particular, St Peter interprets the mustard seed as being Jesus in the womb of Mary--He becomes the tiniest creature in the virginal conception. Yet, the tiniest creature is also the greatest in and hidden way and expands to take care of all the people of the world. First aired on: 10/13/2014