By John L. Allen Jr., CNN

Rio de Janeiro (CNN) - We didn’t need Pope Francis’ trip to Brazil this week to grasp that the new pontiff, who’s set a tone of simplicity and love for ordinary people, is a hit.

Polls around the world show approval ratings that would be the envy of any politician or celebrity, while vast crowds show up in Rome for even his most routine activities.

What Brazil confirmed, perhaps, is that his act plays as well on the road as at home.

During his week in Brazil for World Youth Day, an international Catholic event, mob scenes erupted everywhere Francis went, despite cold temperatures and driving rain for much of the week.

On Monday, frenzied admirers almost hijacked his motorcade. On Wednesday a group of nuns shrieked and rushed the pope like teenage girls at a Justin Bieber concert, and on Thursday he drew more than a million young people to a worship service on Rio’s Copacabana Beach. A Saturday prayer service drew 3 million people, according to organizers.

At one point, Francis greeted 30,000 young Argentines in town for World Youth Day, a gathering that turned this city into a virtual Argentinian colony. Given the fierce national rivalry between the two countries, one local pundit said that under any other circumstances, the presence of so many screaming Argentines in the streets of Rio would have been considered an act of war.

Beyond that, here are four things we learned about Pope Francis from his week in Brazil:

A sedate charisma

Francis was elected at 76, so he doesn’t exude the animal magnetism of the early John Paul II, the last pope to command this kind of popular affection.

Elected at 58, John Paul delivered dramatic gestures like the actor he once was. For instance, he would kiss the ground of whatever country he was visiting, something Francis didn’t do. John Paul would clap and stomp his feet during musical numbers, and at night he would pop out the window of his residence to tell jokes and boom out one-liners.

Francis has a more sedate charisma, allowing his smile, his genuine delight in meeting people, and his homespun wisdom to do the work.

During a visit to a Rio slum, for instance, he said the poor are often the most generous folk, quoting a Latin American proverb: “You can always add more water to the beans.”

Francis may be a rock star, in other words, but not the “pump up the volume” sort. Think Simon and Garfunkel, not the Rolling Stones – or maybe Taylor Swift, not Lady Gaga.

He’s changed the storyline

If proof were needed of how much Francis has changed the storyline about the Catholic Church, consider that he’d been in the global spotlight for five days by the time Friday night rolled around, and no one had even raised the Church’s child sexual abuse scandals until he did so himself.

Speaking at the end of a procession recalling Jesus’ carrying of the Cross, Francis said Jesus is united with all who suffer, including those who “have lost their faith in the church, or even in God, because of the lack of consistency of Christians and ministers of the gospel.”

Boston’s Cardinal Sean O’Malley, a veteran of the Church’s struggles with the abuse scandals who was in Rio for the pope’s visit, said the scandals were “an aspect” of what Francis had in mind.

The veiled reference was a reminder of how much the scandals have hurt the Church. Yet the fact that they didn’t cloud Francis’ trip, as they likely would have for a different pope, was also a lesson in how much Francis has given the Church a new lease on life.

A savvy politician

Heading into the trip, there was fear that Brazil’s massive street protests in June might reignite. Aside from a few scattered incidents, that didn’t happen, and Francis seemed to navigate artfully though the political shoals.

The “Pope of the Poor” repeatedly called for greater attention to the needy, and on several occasions applauded the thirst for justice among young people.

During his visit to a Rio slum, he said that no “pacification” campaign can succeed without addressing the social conditions that breed misery – an indirect slap at recent crackdowns on violence in the slums by local police.

At the same time, Francis didn’t embarrass his hosts. He was gracious with Brazil’s embattled president, Dilma Rousseff. He dropped by Rio de Janeiro’s city palace on Thursday to pray over the flags for the 2016 Olympics, meaning that organizers can literally claim a papal blessing against complaints that splashy events such as the Olympics and the World Cup are a waste of money.

In the end, Francis offered a little something for everyone, without blurring his central message expressed in the slum visit: “The measure of the greatness of a society is found in the way it treats those most in need.”

Energizer Bunny of a Pope

Finally, we learned that despite his advanced age, Francis has a seemingly boundless reserve of energy.

Even before he left Rome, he had trimmed the two days of rest planned for Benedict XVI to one, adding a 150-mile outing to Aparecida, Brazil, on Wednesday to visit a famed Marian shrine, and later in the day stopping by a Rio hospital that treats alcohol and drug addicts.

On the plane en route to Brazil, he stood for an hour to chat with each journalist covering the trip, then spent the rest of the flight talking to his Vatican aides and making notes. A spokesman said nap time had been planned for the pope, but he never used it.

Even on his alleged day off on Tuesday, Francis kept at it. He held a business meeting with a cardinal from Honduras, Oscar Rodriguez Maradiaga, who’s in charge of a new council of eight cardinals from around the world helping the pope with Vatican reform.

At one stage, a Vatican spokesman confessed, “I’m happy we’re halfway through, because if [the trip] were any longer I’d be destroyed.”

Despite the grueling pace, Francis seemed as fresh at the end as at the beginning. Nor will things slow down anytime soon, since he’s already announced that he won’t take the usual papal break in August, but will stay on the job in Rome.

The “Energizer bunny” aspect of his personality should serve Francis well, because his bravura performance in Brazil notwithstanding, the Vatican is not going to reform itself.

John L. Allen Jr. is CNN’s senior Vatican analyst and senior correspondent for the National Catholic Reporter.