What is pain

Pain to me is a demon
That consumes the soul
And destroys you from within
We all have a demon within us
It may not show
But it lays and waits
Untill it is time to vanquish your enemy's
When it's released you may
Never know but others may know
And when it comes it will be within you
Controlling you forever
That is why people get mad and black out
That's when it comes out and lays a path of distruction