When I read D. A. Carson’s sermon on religious doubt a few years ago, I was struck that one of his six possible causes for doubt was “sleep deprivation.” Here’s one of the best scholars in the world telling us that we may be spiritually obligated to take a nap! Don’t ignore his counsel: If you keep burning the candle at both ends, sooner or later you will indulge in more and more mean cynicism—and the line between cynicism and doubt is a very thin one. Of course, different individuals require different numbers of hours of sleep; moreover, some cope with a bit of tiredness better than others.
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