Well. At 70, chances are that there is more sand in the bottom. Unless I live to 140+, which seems a little optimistic. My mom lived to 96, dad to 86, but he died from pneumonia, not old age... His dad lived into his 90s. If I'd known I was going to live this long, I'd of taken better care of myself when I was young!!!.
Still, I am still working, up at 5:30 work days, but college teaching is not that demanding, and off three months in the summer, and a month at Christmas. ... Nice job for someone my age, and gives me a little extra money for my two hobbies: number one... guns, mostly Smiths and Colts, and shooting reloading etc., and number two books. I have been an inveterate reader since childhood. I have thousands of books, some valuable, others valuable only to me.
Has age changed me? To a certain extent. I have a cabin in the eastern panhandle of WV, and have not been there nearly as much as formerly. I still shoot and reload, but focus more on new guns than formerly. I guess I have cut out some of my bad habits as well... I quit smoking cigarettes in 1978. I still enjoy a glass of wine or a craft beer with a meal, but have stopped heavy drinking years ago, I used to travel to Europe often, have not been for several years now... Still have places that I would like to go, just not as big a priority as before. For example, used to go to Russia to visit a Russian Police friend, but he passed away, and though I still have some friends there, it just would not be the same.
Anyway, I don't really think much about the sands equation. Just stay busy and live life one day at a time. By the way, I'm a four year cancer survived myself. Four years ago I wouldn't have predicted that I would be here typing this sentence!!!