The imaginary spiritual life

I found this comment on the quote below from CS Lewis, when I happened to google it for the source (The Pilgrim's Regress doesn't provide the source, and I thought it must be from Lilith, but it's been a long time since I read that). Oh so true.

Note: "'You may think you are dead ...'" C.S. Lewis, creator of Narnia and a great admirer of MacDonald, cited this statement with particular acclaim. "This has a terrible meaning, specially for imaginative people," he wrote. "We read of spiritual efforts, and our imagination makes us believe that, because we enjoy the idea of doing them, we have done them. I am appalled to see how much of the change which I thought I had undergone lately was only imaginary. The real work seems still to be done. It is so fatally easy to confuse an aesthetic appreciation of the spiritual life with the life itself – to dream that you have waked, washed, and dressed, and then to find yourself still in bed" (letter to his friend Arthur Greeves dated 15 June 1930)."

From Why C.S. Lewis loved Lilith.