What Is 'Bearing False Witness'?

“You shall not bear false witness against your neighbor” (Exodus 20:16) began as a courtroom command against lying testimony, but Luther’s explanation shows how far it reaches into everyday speech: “We should fear and love God so that we do not tell lies about our neighbor, betray him, slander him, or hurt his reputation, but defend him, speak well of him, and explain everything in the kindest way.” So this commandment governs not just perjury but the whole realm of how we talk about one another—and by that measure, gossip is indeed that serious.

Consider how much of it the commandment condemns: outright lies, of course, but also slander, spreading damaging information (even true information, when done to harm rather than to help), betraying confidences, and the small daily habit of passing along the unflattering story. Gossip feels minor because it’s so common and so socially rewarded, but Scripture treats the tongue as a fire that “sets on fire the entire course of life” (James 3:6). Reputations, once burned, are hard to rebuild; “death and life are in the power of the tongue” (Proverbs 18:21).

But the most convicting—and most beautiful—part is the positive charge Luther draws out. The commandment does not merely forbid harmful speech; it commands us to actively protect our neighbor: defend him when he’s absent, speak well of him, and “explain everything in the kindest way.” That last phrase is a whole ethic of charity. When we hear something ambiguous about someone, we are to reach for the most generous interpretation, not the worst—to be our neighbor’s advocate rather than his prosecutor. Paul frames it as a rule for all speech: “let no corrupting talk come out of your mouths, but only such as is good for building up… that it may give grace to those who hear” (Ephesians 4:29).

Held against this, our speech convicts us daily—and sends us again to Christ, whose word about us is grace, and who forgives even the sins of the tongue.