The most obvious thing is that there are emotions that become less intense. As soon as people realize they're catastrophizing an event and that there are other ways of viewing it, they gain cognitive flexibility which contributes to creative problem solving. So improves our planning, creative thinking and coping behavior. In the long term, that's actually, I think, more important than the short term reduction in the intensity of our distress. Because when we behave differently, we solve problems and that benefits as much and longer term.