Once upon a time

There was a very lot of sand
and a very little dune
A sturdy desert man
and a timid little moon

And he pitched a tent
Where the water grew
And the trees came up
And the stars shone through

Though the tent didn't move
As the sand rolled away
And the dune shifted place
As the man paused his stay

He said the dunes may shift so slow
There comes a time to track them down
He said all waters ebb and flow
The time will come to pack and go

Some nights are meant for riding out
The days will come to pull up stakes
The road asks if you're strong enough
Your ready heart is what it takes