" Stan Ulam visited whenever he could. “He never complained about pain, but the change in his attitude, his utterances, his relations with Klári, in fact his whole mood at the end of his life were heartbreaking,” he remembers. “At one point he became a strict Catholic. A Benedictine monk visited and talked to him. Later he asked for a Jesuit. It was obvious that there was a great gap between what he would discuss verbally and logically with others, and what his inner thoughts and worries about himself were.” Von Neumann’s scientific curiosity and his memory were the last things he let go. “A few days before he died,” adds Ulam, “I was reading to him in Greek from his worn copy of Thucydides a story he liked especially about the Athenians’ attack on Melos, and also the speech of Pericles. He remembered enough to correct an occasional mistake or mispronunciation on my part.”26 "

― George Dyson , Turing's Cathedral: The Origins of the Digital Universe