The devil works under some cruel disadvantages

This weekend I preach three times about Ephesians 6: Spiritual Warfare. I open with this quote from C.S Lewis that summarizes beautifully what St Paul means with this idea of spiritual warfare. It is a senior devil advising a lower rank devil: 

“He [God] has filled His world full of pleasures. There are things for humans to do all day long without His minding in the least. Things like sleeping, washing, eating, drinking, making love, playing, praying, working. Everything has to be twisted before it is any use to us. We fight under cruel disadvantages. Nothing is naturally on our side.”

Screwtape to Wormwood, in The Screwtape Letters, Letters from a senior to a junior devil, by CS Lewis (1942)