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. ↗
A man's character never changes radically from youth to old age. What happens is that circumstances bring out characteristics which have not been obvious to the superficial observer. ↗
The crucial task of old age is balance: keeping just well enough, just brave enough, just gay and interested and starkly honest enough to remain a sentient human being. ↗