**Note: To understand all quotes from The Screwtape Letters, one must know that this book describes a fictional written correspondence between an experienced tempter, to his novice nephew in the art of damning souls. The correspondence is of course fiction, the techniques are anything but. They are included in Brian Candy as a sneak peak of sorts into Satan's playbook, because knowing the enemy's battle plan can prepare us for his attacks.
The best thing, where it is possible, is to keep the patient from the serious intention of praying altogether... (this real nakedness of the soul)...It is funny how mortals always picture us as putting things into their minds: in reality our best work is done by keeping things out.
C.S. Lewis
The Screwtape Letters pp 20,22