Machine

I am the quintessence of reality,

The black stain on perfection,

Every gear in this machine is oiled and smooth, but here I lay bent and rusted, 

As an inhibitor to progress,

But still I am part of this machine that is the essence of life,

 and so I must work in conjunction with the fantasy that's around me,

As I am only a single puzzle piece, 

in the wrong set.