Is There a Brick Wall Between God and Nature?

Lewis doesn't deny the importance of likeness or analogy, but that will only take us so far. If we seek to pursue that route through to its end by thinking in terms of some sort of chain of being where there's a continuity between God and nature he says it is blocked off. Alisir: Would it be wrong to read Lewis here in a sense in a bit of a Calvinian vein?