Holding a Grudge Can Make You Sick

Loren Toussaint, professor of psychology at Luther College in Iowa, has extensively studied forgiveness and its effects. While unforgiveness, by definition, might seem like merely a lack of forgiveness, Toussaint says it’s more like a mix of several potentially harmful emotions. “With unforgiveness, you’ve actually cooked up a brew of bitterness, hostility, and revenge, a unique combination of emotions that surround your experience of being wronged, and that are virtually indistinguishable from stress,” he says. “And anything that triggers the stress response isn’t good for you.”

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