To form a mental image of something not present to the senses can be a powerful tool. This is especially true for those of us who at times what not to confront and deal with a problem. Or, it may actually help us deal with the problem. Childhood trains us to use our imagination.
Here stands Will and Ian, two of my grandsons. They are trying on their imagination. Their creative ability has certainly been directed toward shields and capes, but hey...their capes are colorful, and their flying ability is yet to be tested. "Here we come to save the day", they seem to be saying. A creation of the mind it is. At least they shared this day in their world of fantasy. Childhood is such a world of exploration...and imagination.