Demon on your shoulder

Hello there, my friend, mind if I join you?
Your face looks quite sad and upset.
My company rarely leaves folks as they were,
Yet seldom they feel a regret.

My names are a plenty and are of no matter,
the thing to remember is this:
I can lead you to places you never believed in,
where sorrows are naught and amiss.

I'm a devil, a teacher, my mind is amazing,
Entry is at your own risk
I'm cunning and witty, my tongue is a razor,
my comments are well timed and brisk.

Dreams are the pathway into my domain,
no map has yet been drawn
Brute force will not carry you over,
here it is brain over brawn

Come, leave behind the shreds of your sanity,
chaos is what we will need
for such is the home turf of genius
pay to your worries no heed.

Good bye now my friend, here I will leave you,
your face occupied by a smile
my company is pleasant yet fleeting,
I shall be back in a while