You can turn your attention to anything, say from the foreground to the background, but then the background becomes the foreground which defeats the exercise. But you must be aware of the background or else there could be no attention. It doesn't move and yet is the origin of attention. What kind of awareness can it be which embraces that which can never be attended to. If attention is only an idea, a kind of inner object, then what is it that it attends to, what kind of idea is it? How are you permitted to wonder about this? Who are you, anyway?