Dear Wormwood...

"... The reason is this. To us a human is primarily food; our aim is the absorption of its will into ours, the increase of our own area of selfhood at its expense. But the obedience which the Enemy demands of men is quite a different thing. One must face the fact that all the talk about HIs love for men, and His service being perfect freedom, is not (as one would gladly believe) mere propaganda, but an appalling truth." Here is my favorite part. "He really does want to fill the universe with a lot of loathsome little replicas of Himself-creatures whose life, on its miniatures scale, will be qualitatively like His own, not because He has absorbed them because their wills freely conform to His. We want cattle who can finally become food; He wants servants who can finally become sons. We want to suck in; He wants to give out. We are empty and would be filled; He is full and and flows over. Our war aim is a world in which Our Father Below has drawn all other things into himself; the Enemy wants a world full of beings united to Him but still distinct."

C.S. Lewis, The Screwtape Letters

I think it doesn't get any better than that. A demon admitting the truth about this spiritual warfare of life. It is clear that he knows what God wants but for some reason or another wants the opposite. He admits that God wants sons while "the father below" wants cattle that can become food.