Knox - Against Gnostic Montanism

THE WHOLE CONTROVERSY about the true Church is not whether it is the Roman Catholic Church or the Greek Church or the Anglican Church or some other definite religious body. The real controversy is this: Is the true Church of Christ a visible or an invisible institution? Ninety per cent of the people who reject the Catholic Church reject it, not because they really believe in some other visible Church, but because they do not believe in a visible Church at all.

- Monsignor Ronald Knox