What Is This?

I really can't describe it.

This that I feel.
feeling

It's not like all those other things,
No, this one's much more...
real.

It's like a fire in my chest.

...

A b
e
a
t
i
n
g
under skin,

I feel it running down my toes,
My elbows, chest and chin.

What is this?
This E-MOSHE-UN?
This weirdly nice hot fire?

Oh, well, I'd guess, that what it is:
Is
INSANITY'S
burning pyre.