When Dr. Jerome Groopman realized there was nothing he could do to treat a patient’s cancer, he went to her hospital room. “Barbara,” he said to her as he grasped her hand, “we’ve been honest with each other every step of the way. I know of no medicines that I can give at this point to help you.” After a long and heavy silence, she said to him, “No, Jerry. You do have something to give. You have the medicine of friendship” (New York Review of Books, September 27).