Most of the disciples of Christ choose to be with Jesus, not become apostles or own possessions. They chose Jesus, because they were enamoured by who he was, what he did and how he went about living his life. They chose to BE with him, rather than BECOME someone or something.
Michael Rua and John Cagliero decided to stay with Don Bosco, not because they wanted to be his successors or bishops or leaders of the Salesian congregation. They merely felt at home with Don Bosco and wanted to BE like him. They had no personal agenda, rather they aligned their own aspirations with that of Don Bosco.
Good to pay attention to this! These individuals who made an impact on the world, chose to BE with their models. Those who decided to stay with the models in order to become something, became politicians or businessmen, not leaders, not models themselves - at least not for the better!