two sides are every wall

In the Walnut Street Jail, no windows would distract the prisoners with street life; no conversation would disturb their penitence. Alone with God, they would be rehabilitated.

There was a small problem. Many of the prisoners went insane.

Lynn Parramore:

The placement of human beings in solitary confinement is not a measure of their depravity. It is a measure of our own.