neuroscientists have discovered that imagining this kind of unimaginable outcome is vital to recovering from a life interrupted. The more we are able to conjure up a future that seems out of reach—I will find another job, I will laugh once more, I will love again—the more we’re able to advance toward it. A big reason is mirror neurons, the part of our brains that mimic the actions we observe. When we see someone jump, laugh, or cry, our brains imitate the same activity.