What does it mean to be catholic? Jesus gave the best definition of the term when he said: 'In my Father's house there are many rooms.' This is not a description of a certain geography in heaven but a revelation of the breadth of God's heart. The bosom of God is not a ghetto. God has a catholic heart — in that catholic means universal, wide, all-encompassing. The opposite of a catholic is a fundamentalist, a person who has a heart with one room.
Thus, any spirituality of the church needs to emphasize wide loyalties and inclusivity.
— Ronald Rolheiser, The Holy Longing: The Search for a Christian Spiritulity by