Thanks to flame69 for the prompting I needed to post another bit!
In his crystal, Jareth watched.
The frightened girl wandered the outside of the labyrinth, seeking the way in. Funny, ugly thing he was, the manifestation of Sarah's cowardice. Even his name was funny. Hogbarth, or suchlike. Perfect.
Unbeknownst to Sarah, the projection that offered such relief was a validating force: Hogwart's apparent fear of the Goblin King merely substantiated his supposed power. And it began to flood through him, beating in his veins.
Simply entering this maze won't be easy, thought Jareth. The entrance to his labyrinth was in her visual center, the perfect place for optical illusions. He laughed, and felt the strength of his resolve masking the openings, hiding them in plain sight. The strange, hairy goblins laughed too.
Frustrated, Sarah screamed and kicked the walls, finally throwing herself down in a huff. If only there were some way to get through…
"Allo!" called a small voice. She turned to see an unusual worm: blue and fuzzy, with enormous eyes. At last! Someone to help her!
"You don't by any chance know the way through this labyrinth, do you?"
Jareth looked on intently. The sheer force of Sarah's frustration had cracked the illusion, yet her confidence was just as broken. The worm did not know the way to the castle, any more than Sarah did. His claim of ignorance caused Sarah's certainty to waver, and allowed Jareth in. Through the fracture flooded Jareth's influence. The once-trustworthy worm, Sarah's guide, had become a creature of the Goblin King.
"Don't go that way! Never go that way." The worm tutted. "If she'd have kept going that way, she'd have gone straight to that castle!"