From Zhuangzi:
There was an old and crooked oak tree by the village shrine, every branch twisted and gnarled. The tree was large enough to shade several thousand oxen and was a hundred spans around. It towered above the hilltops with its lowest branches eighty feet from the ground. More than ten of its branches were big enough to be made into boats. There were crowds of people around it, a marketplace.
Passing the old tree, Hui Tzu, a carpenter’s apprentice said to Shih, the master carpenter, who without even turning his head, walked on without stopping:
“What a useless tree that is. Its trunk and branches were so crooked, so distorted and full of knots. The wood is so beautiful, but it cannot be cut up, no straight plank can be made from it. The tree serves no purpose at all.
There it stands beside the road. No carpenter will even look at it. Even you don’t look at it master.”
Shih the master carpenter replied:
“The tree on the mountain height is its own enemy… The cinnamon tree is edible: so it is cut down! The lacquer tree is profitable: they maim it. Cherry, apple, pear, orange, lemon, pomelo, and other fruit trees. As soon as the fruit is ripe, the trees are stripped and abused.
Their large branches are split, and the smaller ones torn off. Their life is bitter because of their usefulness. That is why they do not live out their natural lives but are cut off in their prime. They attract the attentions of the common world. This is so for all things.
That tree is useless. A boat made from it would sink, a coffin would soon rot, a tool would split, a door would ooze sap, and a beam would have termites. It’s worthless timber and is of no use. That is why it has reached such a ripe old age.
Every man knows how useful it is to be useful. No one seems to know how useful it is to be useless.
This tree has been trying for a long time to be useless. It was almost destroyed several times. Finally it useless, and this is very useful.
So for this big tree, no use? It is planted in the wasteland, in emptiness. People walk idly around it, rest under its shadow. No axe or bill prepares its end. No one will ever cut it down.”
kevinwarstadt.com 
Is this true of old people? They are useful in their uselessness? That seems a bit harsh, but the point is well-taken. When you get to an age where you do not work, you are not the primary caretaker of a family, and you cannot produce anything to enrich the society as a whole, are you useful by sharing your oldness? By imparting wisdom, and encouragement, and perhaps truth?
LikeLiked by 1 person