A beam in your eye

You think that I'm your slave
- a puppet on a string.
Don't like how you behave
- you just don't know a thing.

I ain't your little toy
- simply use or refuse.
Stop treat me like a boy
- I'm a man for good use.

You settle and you fix,
think that I don't get it.
I can see through your tricks.
Think again and set it.

You love to have control.
I'm a beam in your eye.
I quickly change my role
whenever you pass by.

You think that life's a game
where people are pieces.
Well, remember my name.
I know many species.