http://www.mayyoubeblessedmovie.com/820.html
A slightly paraphrased version of an old Edgar Guest poem, The Things That Can't Be Done:
The Things That Can't Be Done
"Somebody said that it couldn't be done,
But she with a chuckle replied
that maybe it couldn't but she would be one
who wouldn't say so till she'd tried.
So she buckled right in with a trace of a grin
on her face. If she worried she hid it.
She started to sing as she tackled the thing
that couldn't be done, and she did it!