Imagination itself is not only for "fantasizing about the best"; it's more like a toolbox that can amplify fear, generate hope, and also perform reality simulations. Many people's problem is that they let it automatically slide towards the worst end, turning things that haven't happened yet into stress in advance. But in fact, we can completely use it in the opposite way: pull imagination towards better possibilities, use it to motivate ourselves, and at the same time verify that possibility through actions, instead of staying in the emotional loop in our minds.