There is a huge difference between growing older and growing up.
If you are twenty years old and lie in bed for one full year and don't do one productive thing, you will turn twenty one years old. Like wise a fifty-seven years old person stay in bed for a year and never do anything he will turn fifty-eight. Whether we like it or not we grow older everyday.
Anybody can grow older. That doesn't take any talent or ability. The idea is to grow up by always finding opportunity in change and to improve. This is easier said than done.
It takes a lot to grow up, mature and become a wise person. Certainly it is a long and hard process. To grow up you need education, experience and mixing with people. You can't do this by just sleeping or sitting at home or just surfing the internet.
Have no regrets. The elderly usually don't have regrets for what they did, but rather for things they did not do. The only people who fear death are those with regrets.
We make a Living by what we get. We make a Life by what we give.