Oliver Wendell Holmes, Jr. was and still is generally regarded as one of the most outstanding justices in the history of the U.S. Supreme Court. He was known as the Great Dissenter because he disagreed with the other judges so much. Holmes sat on the Supreme Court until he was 91. Two years later, President Roosevelt visited him and found him reading Plato. "Why?" FDR asked. "To improve my mind," Holmes answered.
Bits & Pieces, December 13, 1990.