Have just returned from a pleasant couple of "volunteer" hours in the local church and ran into a casual acquaintance who I haven't seen for a month or so. "You really do look well, how do you manage to look so young?" was the greeting.
Since it is at least a third of a century since I was even remotely young this took me by surprise. "I'm glad you think so" I said, "but since I am on the inside looking out I have no idea whether it is true".
After the usual catch-up chat we parted and the conversation set me thinking. Assuming the remark was actually meant and not just a passing pleasantry, it seems to me that the answer is just one word - curiosity!
When we cease to be interested in people, ideas, what goes on around us every day we shrivel, failing to respond to outside stimuli leads to atrophy and losing that most valuable of all asset, a sense of humour is tantamount to throwing in the towel.
Laugh and live, grumble and crumble.
Is this really the answer, who knows? but at least have fun finding out.