Why does Thomas finally stop running from the one griever?

From the text:

Thomas sat back against it himself, panting from exertion, thinking. As he looked into the dark recesses of the Maze, he searched his mind for a solution. He could hardly see anything, and he knew, despite what Minho had said, that it’d be stupid to run even if he could carry Alby. Not only was there the chance of getting lost, he could actually find himself running toward the Grievers instead of away from them.