Liar liar pants on fire

Been quite discombobulated.  
don't bother asking why.  
There appears to be no reason  
why the mind begins to lie.  
 
It latches on to feelings  
from memories long ago.  
Awakens pain in every cell  
creates an undertow.  
 
It traps you in a vortex  
where black dogs like to bite  
It's a sneaky little bastard  
at morning, noon or night.  
 
Agreed, it's quite the arsehole  
don't believe a word it speaks  
Avoid its constant chatter  
avoid its dark techniques.  
 
Batten down the hatches  
put the chairs against the door  
Don't engage with it in chit chat  
it will drag you into war.  
 
It hates when you ignore it  
you'll cut off it's food supplies.  
It's a monster bloody bully  
look it straight between the eyes.  
 
This poems not a classic  
there's better you will find.  
But the point of this non classic  
was to simply ease my mind.