In The Dharma Bums, Ray Smith (Jack Kerouac’s autobiographical character) describes his parting with his dear friend Japhy Ryder:

The next day I figured to give Japhy some kind of strange little going-away gift and didn’t have much money or any ideas particularly so I took a little piece of paper about as big as a thumbnail and carefully printed on it: MAY YOU USE THE DIAMONDCUTTER OF MERCY and when I said goodbye to him at the pier I handed it to him, and he read it, put it in his pocket, and said nothing.

Martin Luther said the Gospel was a “little word.” A little word–Mercy–with great power. As Luther wrote in his hymn, A Mighty Fortress, describing the battle the Christian fights with the devil: “…one little word shall fell him.”