As he ran toward the Glade, he learned a lot about himself. Without meaning to or realizing it, he'd pictured in his mind his exact route through the Maze as he escaped the voice. Not once did he falter on his return, turning left and right and running down long corridors in reverse of the way he had come. […] Soon, Thomas would be the best Runner. The second thing he learned about himself, as if the night in the Maze hadn't proved it already, was that his body was in perfect shape. (29.6)

It shocked him when he realized he'd been running for almost an hour—the shadows of the walls ran long toward the east, and soon the sun would set for the night and the Doors would close. He had to get back. It only peripherally hit him then that without thinking he'd recognized the direction and the time. That his instincts were strong. (29.2)