Christians love a good slogan. The problem is, many of the lines we toss around at funerals, hospital rooms, and awkward church lobbies never came from the Bible. They came from Poor Richard's Almanack, a Persian proverb, or a 17th-century poem-and when those sayings get baptized as Scripture, people get hurt.

In The Bible Doesn't Say That, Dustin Gross takes a scalpel-and a sense of humor-to the phrases we've treated like gospel: