Friends, the first reading and Gospel this Sunday have to do with the Church at war with itself. The devil is the scatterer, the divider, and one of his favorite tricks is to take the Church—which is meant to be an instrument of the Gospel in the world—and to turn us against one another.

Friends, why was the story of Jesus with the little children, versions of which appear in the three synoptic Gospels, so vividly remembered by the first Christians? I think they intuited that it got very close to the heart of Jesus’ teaching. The way Mark sets up his account of this story in our...