Passage: Christian Bale as Bruce Wayne / Batman:A billionaire socialite who, after witnessing his parents' death in a mugging at age 8, travels the world for seven years before returning home to operate as a bat-masked vigilante hailed as Gotham City's "Dark Knight", using fear against the city's criminal underworld at night. Bale said he was confident in his choice to return in the role because of the positive response to his portrayal in Batman Begins. He continued training in the Keysi Fighting Method and performed many of his own stunts, but did not gain as much muscle as in the previous film because the new Batsuit allowed him to move with greater agility. Bale described Batman's dilemma as whether "[his crusade is] something that has an end. Can he quit and have an ordinary life? The kind of manic intensity someone has to have to maintain the passion and the anger that they felt as a child, takes an effort after a while, to keep doing that. At some point, you have to exorcise your demons." He added, "Now you have not just a young man in pain attempting to find some kind of an answer, you have somebody who actually has power, who is burdened by that power, and is having to recognize the difference between attaining that power and holding on to it." Bale felt Batman's personality had been strongly established in the first film, so it was unlikely his character would be overshadowed by the villains, stating: "I have no problem with competing with someone else. And that's going to make a better movie."Michael Caine as Alfred Pennyworth:Bruce's trusted butler and confidant, who supplies useful advice to Bruce and likeness as a father figure, leading him to be labeled "Batman's batman".Heath Ledger as The Joker:A psychopathic illegalist mastermind portraying himself as an "agent of chaos", who rises from the criminal underworld by thrusting Gotham into anarchy and drawing Batman ever closer to crossing the fine line between heroism and vigilantism. Before Ledger was cast in July 2006, Paul Bettany, Lachy Hulme, Adrien...

Question: What makes being batman difficult?
to have to maintain the passion and the anger that they felt as a child