Conversation with a shapeshifter

I was shutting

the doors to

my optical cabinets

when a curious fellow

introduced himself

with a sharp and

malevolent grin

as I gazed upon him

I couldn't grasp

a clear image of

what his face might be

for with each ticking

of each second

on the clock down the hall

I was looking upon

a different face

his form would not

or maybe even could not

rest on one image

at first I was amused

with the wonder

of the fluid face

but tired soon

and began questioning,

"Who are you?"

"What do you want?"

"Why are you here

in all these various forms?"

then slowly yet abruptly

the fellow chose

to come to rest

upon a hideous sight

that very one mentioned

previously concerning the grin

and his eyes were large

dark blue empty circles

with his triangular teeth

shown gritted and full

while his words spilled

out from somewhere else

and his words more hideous

than his expression 

when he told me,

"I am you within"