Summarize in your own words the gist of Fagin's lecture to Oliver on page 136

Fagin gives Oliver a long lecture on loyalty, and tells him the story of a boy like him who ended up hanged for betraying them. For many days, Oliver is locked in his room, but then even when he is allowed to wonder the house, he can’t leave. One evening, the Dodger has Oliver come and clean his boots, and tries to convince him to become a thief, using twisted moral arguments. Oliver is not convinced, but is afraid to say too much. He then meets Tom Chitling, who is an older one of Fagin’s boys and has just come back from prison. From this evening on, they rarely leave Oliver alone, constantly trying to convince and train him to be a thief.