I am the leftover sand, deposited in the tracks of a wave
The wave is so powerful, it has a course
A purpose
Billions of water molecules are on it's side
They're an army
Support
While they pave the road to their destination
I'm left behind.

I am the "good" eraser
Lost in the dark depths of your school bag
I don't matter.
You don't remember ever having me
But when you have something to erase
Suddenly you start digging in the pile of junk
Where I belong
I am never noticed
until
You decide to use me for your own benefit.

Maybe I'm the sidewalk beneath your feet
You never notice how dependent you are
upon me
But if I were to disappear
You'd be stuck.

Or more likely
I'm a single strand of hair on your head
Always there
But never thought of
For there are so many others to replace me
So when I finally shed
No longer with you
Everything carries on
as usual