Sometimes it's hard to imagine biblical figures living lives outside of what we read in the Bible. What was Peter's home life like? Did he ever get sick? Well, we do have some stories that tell us a bit about the early Christians. Polycarp, for example, tells an interesting story about John the Apostle and someone named Cerinthus. And Polycarp himself had a similar encounter with Marcion, one of the arch-heretics of Christian church. Here is the story.