All at once I implore my mind to imagine nothing but walls. Walls. White walls. Blocks of concrete. Empty rooms. Open space. I build walls until they begin to crumble, and then I force another set to take their place. I build and build and remain unmoving until my mind is clear, uncontaminated, containing nothing but a small white room. A single light hanging from the ceiling. Clean. Pristine. Undisturbed.