If there was a controlling power outside the universe, it could not show itself to us as one of the facts inside the universe -no more than the architect of a house could actually be a wall or staircase or fireplace in that house. The only way in which we could expect it to show itself would be inside us as an influence or a command trying to get us to behave in a certain way. And that’s just what we do find inside us.
C.S. Lewis, The Case for Christianity