The Gulag Archipelago
It was only when I lay there on rotting prison straw that I sensed within myself the first stirrings of good. Gradually, it was disclosed to me that the line separating good and evil passes, not through states, not between classes, nor between political parties either, but right through every human heart, and through all human hearts. So, bless you, prison, for having been in my life.
Alexander Solzhenitsyn, The Gulag Archipelago