I found this while surfing the net...

It's not too late... the angel said.
Even though the world's a mess...
Even though you're not as young...
Even though you've made mistakes and have been afraid
It's not too late...
And then I saw the world through the angels' eyes...
I saw the colors I could paint
The bridges I could build
The lives that I could touch
The dreams that could still come true
And it became very clear to me...
That it's not too late.

-Ron Atchison

Yes there are so many things which are just left out, the things which we wanted to do but due to some reasons we could not even look at it and later on as well we say let it be its too late taking that thing up again (offcourse physical activities we can't sometimes). But we are so wrong in thinking like that and we just regret sometimes on not doing those things...