‘Difficult’ and ‘impossible’ are cousins often mistaken for one another, with very little in common.

First the thought and then the act
To think a plant up towards the sun
It can’t be done, it can’t be done
…
Sam and Libby, Lib and Sam
Made a little one of them
A baby’s born a man to die
I don’t know why, I don’t know why

...But that’s disregard. You find another friend and you discard as you lose the argument in a cable car, hanging above as the canyon comes between…