This quote is right after they found Dill hiding under a bed and Jem and Scout were reacting to it. Rather than going along with some scheme like earlier in the story, Jem tells Dill that his mother would be worried and tells Atticus. This shows courage, because instead of following his friends, he follows his own judgement and does the right thing. This also shows that Jem is indeed maturing and doing what he thinks is the most moral thing. I predict that Jem will continue growing up and will do the right thing throughout the rest of the story, and I believe this because Jem as slowly been developing already.
