A ream of recent scientific research has given the faithful reason to rejoice: Belief is good for you.

Consider a study of nearly two million Twitter messages sent by prominent Christians and atheists, published in June in the journal Social Psychological & Personality Science. It found that Christians were more content, if not happier. The authors came to this conclusion by analyzing the language tweeters used: Christian tweeters used positive words more often than atheists, and negative words less often.

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