In C.S. Lewis’s classic Christian satire, senior demon Screwtape advises his nephew Wormwood, a newbie tempter, on how to get his “patient” to look away from the truth:
Don’t waste time trying to make him think that materialism* is true! Make him think it is strong, or stark, or courageous – that it is the philosophy of the future. That’s the sort of thing he cares about.
And that’s how you do it.
*Substitute: wisdom of invading Iraq; effectiveness of massive online classes; etc.