Age is a number that tells us how long we have been in this form. It has nothing to do with health, fitness, ability or creativity.
Example: Guan Tianlang. Those of you who don't follow golf have no idea who that is, am I right? He is a 14 year old, Chinese golfer who just won the Asian amateur championship in Bangkok. With the trophy comes an invitation to play at the Master's this coming spring.
Evidetly Guan doesn't know he's too young (and the youngest by 2 years) to acocmplish such a feat. And all the 'yips', the pressure the commentator talk about on a Sunday when a golfer is winning, is absent in this young man. He hasn't lived long enough to develop a fear of loss. He was asked how he hit such a great chip shot on 18. He said, "I was a bit nervous but I believed in myself."
That's all it takes folks, believe in yourself. Doesn't matter if you are 14 or 94-keep believing. You truly can do anything you set your mind to do. Retire from life or change the world - it's your choice.