Imagine that your biography was written by an enemy of yours. And that its information was all anyone would have not only for the rest of your life but for centuries to come. You would never be able to refute it -- and even if you could no one would believe you because your accuser was a saint. That is the problem we face with Pope Callistus I who died about 222. The only story of his life we have is from someone who hated him and what he stood for, an author identified as Saint Hippolytus, ...