The Question and Answer section for The Maze Runner is a great resource to ask questions, find answers, and discuss the novel.
From the text:
"Out there's the Maze," Newt whispered, eyes wide as if in a trance. "Everything we do — our whole life, Greenie — revolves around the Maze. Every lovin' second of every lovin' day we spend in honor of the Maze, tryin' to solve...
This quote can be found in Chapter Seven. Newt's look of disbelief came when the second "newbie" appeared. This was the first time two newbies had appeared in one day.
In Thomas' opinion, the best case scenario would be that everyone will get out except him. He is willing to sacrifice himself in order to save the other.