Let me then, to avoid further ambiguity, give a list of certain leading doctrines which no Catholic, upon a moments reflection, could accept on the authority of the Church and on that ground alone.
(i.) The existence of God.
(ii.) The fact that he has made a revelation to the world in Jesus Christ.
(iii.) The Life (in its broad outlines), the Death, and the Resurrection of Jesus Christ.
(iv.) The fact that our Lord founded a Church.
(v.) The fact that he bequeathed to that Church his own teaching office, with the guarantee (naturally) that it should not err in teaching.
(vi.) The consequent intellectual duty of believing what the Church believes.
--Msgr Ronald Knox, The Belief of Catholics, 1927