To believe in Christ means to desire unity; to desire unity means to desire the Church; to desire the Church means to desire the communion of grace which corresponds to the Father’s plan from all eternity. Such is the meaning of Christ’s prayer: “Ut unum sint”. 10. In the present situation of the lack of unity among Christians and of the confident quest for full communion, the Catholic faithful are conscious of being deeply challenged by the Lord of the Church. The Second Vatican Council strengthened