At age 92...................

.....After breakfast the Judge announced he was going to loaf all day.  "Ninety-two has outlived duty," he said with what seemed a vast satisfaction.  Half an hour later he was calling for his secretary to read to him.  "let's have a little self-improvement, Sonny,"
     Beyond all other traits, this perpetual thirst to learn surprised both young and old.  Franklin D. Roosevelt, a few days after his inauguration in 1933, came round to call.  He found Holmes in his library, reading Plato.  The question rose irresistibly, "Why do you read Plato, Mr. Justice?"
     "To improve my mind, Mr. President," Holmes replied.
-Catherine Drinker Bowen,  as excerpted from
Yankee From Olympus: Justice Holmes and His Family