I followed. “Dr. Stone,” I said, using his title though I longed to cry out, Father! “An operation is his only chance,” I said. In my heart I knew the chance was infinitesimally small, and the first whiff of anesthesia might end it all. My father put his hand on my shoulder. He spoke to me gently, as if to a junior colleague rather than his son. “Marion, remember the Eleventh Commandment,” he said. “Thou shall not operate on the day of a patient’s death.”
This quote comes early in the book though it is part of the conversation near the end of the story when Marion tries to persuade Stone to operate to save the life of Shiva, dying with a brain bleed after he had survived the surgery where he donated part of his liver to save Marion's life.