It's fasting season--namely the 21-day Daniel Fast season. How do I know? Because just about everyone is tweeting about it, Instagramming and Facebooking their spiritual "sacrifice." It's a most perplexing phenomenon to me. When I was growing up, the church I attended didn't encourage banner displays of fasting. And I'm pretty sure the Bible doesn't either.

Back in the day, those who were fasting were urged to...