As time went by, Jem came to realize that Boo Radley was not the terrible "boogie man" that he and Scout (and Dill) had imagined. It began on the night that Jem lost his pants, when he returned to find the tears sewn "all crooked." He told Scout that it was "Like somebody was reading my mind." Later, after discovering the pocket watch and chain along with the knife, he told his sister that "I just don't get it... I don't know why, Scout." Then, on the night of the fire when Atticus informed them that it must have been Boo who had quietly placed the blanket around Scout, Jem told her that "I ain't gonna do anything to him."
In Chapter 23, after discussing the Cunninghams, Atticus tells the children that "there's just one kind of folks. Folks." Jem thinks for a moment and then tells Scout that he thinks he understands why Boo stays inside his house: "... it's because he wants to stay inside."