Decade

A Decade ain't what it used to be
It used to seem like a century
Now it seems more like a year
Caught between courage and fear

A Decade ain't what it used to be
Ten times around the sun with me
Wondering how many we have left
Trying to feel sorry for myself

A kid in the 50s
Hippie in the 60s
A man in the 70s
Father in the 80s

A Decade ain't what it used to be
It used to seem like a century
How time flies, it can't be bought
Grandpa said life is short

Jim Colyer ascap

This is some of your best work. Love the rhymes.
Are you sure the beat doesn't allow for "Grandpa said life is too short"?
Nothing really wrong with "Grandpa said... Life is short"? Up to you, of course.