“I sometimes dream of devils. It's night, I'm in my room, and suddenly there are devils everywhere. In all the corners and under the table, and they open doors, and behind the doors there are crowds of them, and they all want to come in and seize me. And they are already coming near and taking hold of me, But suddenly I cross myself and they draw back, they are afraid, only they don't go away, but stand near the door and in the corners, waiting.

And then I'm suddenly overcome by a desire to begin cursing God in a loud voice, and I begin cursing him and they all rush at me again in a crowd, they're so pleased, and they're again about to lay hands on me and I cross myself again and they draw back at once. It's great fun. Oh, it takes my breath away." Fyodor Dostoevsky, The Brothers Karamazov.