In this short excerpt from C.S. Lewis’ The Screwtape Letters, the fictional demon Wormwood instructs his apprentice Screwtape to build on the doubts that often occur once the initial spiritual and emotional exuberance of conversion begin to wear off.
Lewis’ imaginative advice here is a helpful reminder of the spiritual battle we are in, and the enemies’ goal to dampen our faith, making it an ineffective little part of our lives, rather than a world-changing faith.
Let him [the Christian] assume that the first ardours of his conversion might have been expected to last, and ought to have lasted, forever, and that his present dryness is an equally permanent condition. Having once got this misconception well fixed in his head, you may then proceed in various ways. It all depends on whether your man is of the desponding type who can be tempted to despair, or of the wishful-thinking type who can be assured that all is well. …
[Make] him doubt whether the first days of his Christianity were not, perhaps, a little excessive. Talk to him about ‘moderation in all things’. If you can once get him to the point of thinking that ‘religion is all very well up to a point’, you can feel quite happy about his soul. A moderated religion is as good for us as no religion at all—and more amusing.
C.S. Lewis, The Screwtape Letters (1942) in The Complete C. S. Lewis Signature Classics, HarperOne, 2007, p.210.