They used to say a personality was phlegmatic

Or someone had too much bile.

Now they tell us it’s gluten intolerance
that causes the intestine to swell,
the elbows to break out in a rash.
But you know this:
The bowel is the world’s true compass.
There are real things wrong with the world
and that is the cause of all this distress.
You had a certain gut instinct.

The mind may play tricks. 
but the colon never lies.