Our minds are all that defend us from the horror of the void. The majority of the time we simply think about something--anything--else, and that itself is an act of defiance against the vast nothing of the universe. But minds break down and stop thinking sometimes. They feel instead: A looping, gnawing monster eats away confidence and goals and even a sense of duty until we are in a dry bleak place of ennui, unable to focus on the minutiae that used to keep us moving. Tongues taste chalk and ashes, and eyes see only gray washes occasionally penetrated by bright stabs of panic. Depression is a prison to which you have the key except you never think to look for it.