The answer to old age is to keep one's mind busy and to go on with one's life as if it were interminable. I always admired Chekhov for building a new house when he was dying of tuberculosis.
“One person who has mastered life is better than a thousand persons who have mastered only the contents of books, but no one can get anything out of life without God.”
“Every once in a while I get the highly inappropriate proposal which is like, 'Wow, Really! You don't even know me and I don't know you at all, and you want that to happen? Tonight? Ok, I get off work at 7.30.'”