" We had risen to go, but there was something in the woman's voice which arrested Holmes's attention. He turned swiftly upon her.
"Your life is not your own," he said. "Keep your hands off it."
"What use is it to anyone?"
"How can you tell? The example of patient suffering is in itself the most precious of all lessons to an impatient world. "

― Arthur Conan Doyle , The Casebook of Sherlock Holmes: Volume 2