Uhm tell me?

 A mind inside a cavity

with walls as thick as own head,

To be able to see the light

It has to fight its own wit

The latter being wiser 

Desires to choose from the concoction,

Puts forward an opinion

A question that stands an auction. 

Will you choose to have yourself, 

or have this will you may not, 

to be able to choose yourself

and put yourself apart?