What does the last paragraph of chapter 7 tell us about Jem?

In the last paragraph we see evidence of Jem's newfound maturity and loss of innocence. Mr. Radley's cementing of the tree makes Jem cry because he begins to understand the limits and control Boo lives under. He isn't allowed to do anything.... even if it makes others happy. Through Mr. Radley's actions, Jem learns that the Boo they all gossiped about, taunted, and made the butt of jokes and games hadn't chosen his situation. It was imposed upon him..... the man wasn't an enigma or ghost, he was a prisoner in his own home.