“Once the Catholic accepts the eternal truths of Christ, he is free to accept all the nonessential beliefs he pleases.  He can be a monarchist or a republican; he can live solitary and alone on a pillar like Simon, or he can busy himself on the streets of Paris like a Vincent de Paul; he can accept Einstein or reject him; he can believe in the gold standard or the silver standard; he can play cards and dance, or he can abstain from them; he can drink moderately or he can be prohibitionist.  He is like a man living on a great island in the sea on which he may roam and exercise his freedom in a thousand and one games, but only on condition that he obey the only law that is posted there: Do not jump over the walls.”  Archbishop Fulton Sheen (Communism and the Conscience of the West)