Many of my friends parents act a lot older, even though they are nearly ten years younger than mine. And it's easy to see the difference.
My parents are still learning.
We all marvel at how quickly my daughter is learning, and it's easy to associate learning with youth. But you're never too old to pick up a new skill that might enrich your life.
My friends ask me if I'm worried about my mum and dad being hit by a bus. I think back to the time when I used to go sky-diving and what I used to tell them when they worried about me.: If I die doing something I love, don't be sad. I accept the risks and the consequences that go along with them. It's worth it for the experience.
So to keep young, put aside your fears and learn new things....
and be happy.