In reading the responses I notice that for a large part, the younger people (kids to us) believe they feel old, while the more mature people still feel young. Here are the people with their long, entire lives before them yet, their best yet to come, and they feel old already. Perhaps they have not yet learned what "old" is, or they fail to appreciate the gifts they are given, the value and promise of years yet to come. There seems to be some kind of irony here, but it eludes me at the time.