The very nerve of our contention is that the material world which meets us in our experience does not provide the explanation of its own existence, or of the forces which control it, or of the laws which govern it, that the explanation, consequently, must be looked for in something that is outside and beyond itself. Our thought can only be satisfied by the existence of some necessary Being, to which all this contingent existence around us, the world of creation, is secondary, and upon which it depends.
--Msgr Ronald Knox,
The Belief of Catholics, 1927
