We've all heard it... usually looking at an old photo. "Wow, I looked so young! I looked so thin. I looked so..."
10 years from now, you'll look at a photo of you today and say the same thing. So, what's the use of any of it, if all we do is look back 10 years and wish we could go back? Enjoy it today. Enjoy it tomorrow.
It's no good being young, thin, fit, or whatever else, if it's only to complain 10 years later about not being it anymore.