Henry Van Dyke,
The Unknown Quantity: A Book of Romance and Some Half-Told Tales
“ Every attempt to penetrate the ice of his anguish failed. He gave no sign of why or how he suffered. Most of the time he spent alone in his book-room, sitting with his hands in his lap, staring at the unspeakable thought that paralysed him, the thought that was entangled with the very roots of his creed and that glared at him with monstrous and malignant face above the very altar of his religion—the thought of his last prayer—the effectual prayer, the fervent prayer, the damnable prayer that branded his soul with the mark of Cain, his brother's murderer. ”
