Who said "The darkness is closing in."?

This quote is attributed to Newt.

The darkness is closing in. - Newt

"The darkness is closing in."

Newt

Character in The Maze Runner

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"You're the last one to arrive. And you can't remember anything."

"The walls move. Every night they close in, then open again in the morning."

"The outside world might be worse than this."

"What's happening to me? What's wrong with me?"