Dim lights shined on a dark path as a young man followed his guide toward a wooden elevator, which rested on the edge of a deep, seemingly endless cavern. Nerves begin to take over as the young explorer thought of what was to come. The cart begins its descent into the darkness, becoming immersed in the shadows, eliminating all sight and heightening the rest of his senses in a pointless attempt to gather any bearing.
Being completely surrounded by darkness, the feeling of a heavy discomfort overtakes the young man who then, out of curiosity, reaches his hand out to find that he is completely surrounded by nothing.
Through his experiences in that dark cave, this is how Tech. Sgt. Garry McLean describes his battle with depression.