He reappeared(that clock headed old man),
With a smile that warmed my heart glad.
"There's only one difference between
a madman and me. I am not mad. "
I chuckled then said" prove it if you can" .  

He  vanished a step later, in a cloud;

Proving himself, and proving me the mad one.
He is the shores, I'm just a visitor.
He splits beneath me now:
The sky calls out to the sinister:
“ Give me your head( a sincere solemn vow).

The sky changed from blue to green.
I repeated his words, with nothing to add:
"There is only one difference between
a madman and me. The madman thinks he is sane.
I know I am mad."