Simply stunning stuff. Kevin Light-Roth is incarcerated and writes about spending a long time in solitary confinement:

Your mind retreats into daydreams and your daydreams grow complex and immersive. They tug you along on a course of their own devising, heeding none of your direction. Invariably, they involve conflict with someone, a real person from the life you once had or some imagined antagonist. You pace your cell reciting aloud the clever points you would make to these chimeras, issuing ultimatums to them. The daydreams are in no way pleasant and altogether unwanted. They enrage you.

Unforgettable. Go read it.