At Leasts can turn regret into relief. On their own they don’t change our behavior, but they change how we feel about our behavior, which can be valuable. And because At Leasts spring to mind naturally far less often than If Onlys, we must summon them ourselves at the right time. At Leasts work like antibiotics. Sometimes we need to reach into the medicine cabinet and pop a few of them to fortify our psychological immune system and fight off certain harmful emotions.[4] If we use these antibiotics too often, their efficacy will wane. If we use them intelligently, they can aid in healthy
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