It sounds as if you supposed that argument was the way to keep [a human] out of the Enemy’s clutches. That might have been so if he had lived a few centuries earlier. At that time the humans still knew pretty well when a thing was proved and when it was not; and if it was proved they really believed it. They still connected thinking with doing and were prepared to alter their way of life as the result of a chain of reasoning. But what with the weekly press and other such weapons we have largely altered that.
Your man has been accustomed, ever since he was a boy, to have a dozen incompatible philosophies dancing about together inside his head. He doesn’t think of doctrines as primarily “true” or “false,” but as “academic” or “practical,” “outworn” or “contemporary,” “conventional” or “ruthless.” Jargon, not argument, is your best ally in keeping him from the church. Don’t waste time trying to make him think materialism is true! Make him think that it is strong, or stark, or courageous–that it is the philosophy of the future. That’s the sort of thing he cares about.
The trouble with argument is that it moves the whole struggle on to the Enemy’s own ground. He can argue too; whereas in really practical propaganda of the kind I am suggesting He has been shown for centuries to be greatly the inferior of Our Father Below. By the very act of arguing, you awake the patient’s reason; and once it is awake, who can foresee the result? Even if a particular train of thought can be twisted so as to end in our favor, you will find that you have been strengthening in your patient the fatal habit of attending to universal issues and withdrawing his attention from the stream of immediate sense experience. Your business is to fix his attention on the stream. Teach him to call it “real life” and don’t let him ask what he means by “real.”
-C.S. Lewis, The Screwtape Letters.
“Lump of tissue.” “Choice.” “Reproductive freedom.” “Research.” Jargon. Whatever you do, don’t call something what it actually is.