How did Thomas in the Maze Runner change from the beginning to the end of the book?

The protagonist of the story. He arrives in the Glade with no knowledge of who he is or was. He only remembers his name and nothing else about his life. Thomas proves to be brave, loyal, and clever, with isolated telepathic powers and a very limited memory of previous knowledge of the Maze. Soon after arriving in the Glade, Thomas makes both friends and enemies and proves a leader among the boys. By the end of the book he has a sense of identity and purpose that he never had before.

He comes to the glade unaware of his surroundings and confused, but by the end of the book he is the one who takes charge and helps everyone escape