The Monster in my head

They say that monsters don't exist, but this much isn't true.

For there's a monster in my head that can't be seen by you.

This monster can't be beaten with a sword or with a shield.

This monster never tires and it surely never yields.

This monster only lives to haunt the corners of my mind.

This monster says a thousand words, none of which are kind.

This monster takes on several forms: Fear, Depression and Shame.

It brings to light my darkest thoughts as if it were a game.

There is no peace for me with this monster in my head.

I'll never get the peace I crave till one of us is dead.