Archbishop Fulton Sheen compares the Church today with the "Church in the Wilderness"; and he mourns what he calls a "kind of de-Eucharistization going on": the Jews complained "We are tired of this Manna" There is a rebellion against authority. Sheen refers to Christ's Prayer for Unity at the Last Supper. He tells us that "when the Church is holy, She is persecuted from without; when She is not holy, She is persecuted from within." He stresses that we are protected from evil "only when we are united to Peter" The Dublin Retreat is a retreat in 16 parts.