ROME 鈥 marveled at the "huge learning curve" he took on as pontiff and likened some aspects of the job to jumping "in on the deep end of the pool very quickly," in excerpts of an interview released Sunday on his 70th birthday.
The pope also lamented widening income gaps between the working class and CEOs, recalling the recent news that could be in line to become the world's first trillionaire.
"If that is the only thing that has value anymore, then we're in big trouble," Leo said in the comments, the pope's first interview as history's first American pope.

Pope Leo XIV appears Sunday at his studio's window to bless the faithful gathered in St. Peter's Square at the Vatican.
The comments came a day after Musk's brother's company, Nova Sky Stories, staged a light show over the Vatican featuring 3,000 drones depicting images from the Sistine Chapel and even Pope Francis' face.
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The interview was conducted this summer by Vatican correspondent Elise Ann Allen for her forthcoming biography of Leo. Excerpts were published Sunday on Allen's Catholic news site Crux, and in the El Comercio daily of Peru.
In the excerpts, Leo spoke about feeling both American and Peruvian, given his dual citizenship and 20 years of missionary experience in Peru. He said that experience gave him great appreciation of the Latin American church and Pope Francis' ministry as history's first South American pope.

An image of Pope Francis, made by drones, hovers Saturday over the basilica in St. Peter's Square during a concert marking the conclusion of the World Meeting on Human Fraternity at the Vatican.
Asked whether he would root for the U.S. or Peru in a future World Cup, Leo drew parallels to his childhood in Chicago and the value of not shutting down opponents.
"Even at home, I grew up a White Sox fan, but my mother was a Cubs fan, so you couldn't be one of those fans that shut out the other side," he said. "We learned, even in sports, to have an open, dialogical, friendly and not angry competitive stance on things like that, because we might not have gotten dinner had we been!"
Francis promoted Leo to a top job at the Vatican in 2023, making clear he viewed him as a potential successor. Nevertheless Leo said he wasn't fully prepared for the job.
"There's still a huge learning curve ahead of me," he said, adding that he had found his footing as pastor, but that the challenge was the job as world leader.
"On that one I had to jump in on the deep end of the pool very quickly," he said.

Faithful display a banner wishing happy 70th birthday to Pope Leo XIV in St. Peter's Square as he appears Sunday at his studio's window at the Vatican.
Leo's 70th birthday is celebrated at the Vatican
The interview was released Sunday as Leo marked his 70th birthday, which was celebrated at the Vatican during his traditional noon blessing.
Leo saw giant "Happy birthday" banners, in English, Italian and Spanish, balloons and congratulatory signs held up by the faithful gathered in St. Peter's Square. Groups of Peruvian believers, including dancers in traditional attire, were out in force.
"Dear friends, it seems you know today I have turned 70," Leo said to cheers. "I thank the Lord, my parents and all those who remembered me in their prayers."
When he was elected last May at age 69, the former Robert Prevost was the youngest pope since 1978, when Karol Wojtyla was elected Pope John Paul II at age 58.
Many people in the square knew it was Leo's birthday and wished him well, especially given the weight of responsibility he took on to run the Catholic Church.
"Well, he definitely needs a lot of support, because he has to carry on a pontificate during a particularly difficult period, both for geopolitical issues and certainly for internal matters," said Lorenzo Vecchio, a member of a Catholic university group in the piazza. "We are certainly happy that he is a very young pope."

Pope Leo XIV's childhood home is seen May 9 in Dolton, Ill.
Party in hometown
The Chicago suburb where Leo grew up marked his 70th birthday Sunday with gospel music and a balloon release outside his boyhood home.
A small crowd attended the festivities outside the modest brick house in the village of Dolton, where the former Robert Prevost grew up after he was born in 1955 in Chicago, about 20 miles away.
鈥淚t鈥檚 a good time for the community to come together,鈥 Village President Jason House said. 鈥淚t shows that great people come out of the village of Dolton.鈥
The village purchased the house in July in hopes of boosting tourism and claiming a piece of papal history of the first American pope. They鈥檙e also trying to drum up a positive message about the community where there鈥檚 been political turmoil in recent years, including misspending allegations surrounding a previous mayor.
Photos: A new pope, Leo XIV, is chosen

White smoke billows from the chimney of the Sistine Chapel where 133 cardinals are gathering on the second day of the conclave to elect a successor to late Pope Francis, at the Vatican, Thursday, May 8, 2025 (AP Photo/Alessandra Tarantino)

People react as white smoke billows from the chimney of the Sistine Chapel where 133 cardinals are gathering on the second day of the conclave to elect a successor to late Pope Francis, at the Vatican, Thursday, May 8, 2025. (AP Photo/Luca Bruno)

Swiss Guards march after a new Pope was elected when 133 cardinals gathered on the second day of the conclave to select a successor to the late Pope Francis, at the Vatican, Thursday, May 8, 2025. (AP Photo/Markus Schreiber)

Faithful celebrate after white smoke appeared from the chimney of the Sistine Chapel where 133 cardinals gathered on the second day of the conclave to elect a successor to late Pope Francis, at the Vatican, Thursday, May 8, 2025. (AP Photo/Emilio Morenatti)

CORRECTS TO LEO, NOT LEONE - Cardinals following the election of Cardinal Robert F. Prevost as the 267th pope, choosing the name of Pope Leo XIV, at the Vatican, Thursday, May 8, 2025(AP Photo/Andrew Medichini)

Clerics wave US flags during the speech of the newly elected Pope Leo XIV at the Vatican, Thursday, May 8, 2025. (AP Photo/Francisco Seco)

People listen the speech of the newly elected Pope Leo XIV at the Vatican, Thursday, May 8, 2025. (AP Photo/Francisco Seco)

Newly elected Pope Leo XIV appears at the balcony of St. Peter's Basilica at the Vatican, Thursday, May 8, 2025. (AP Photo/Alessandra Tarantino)

Newly elected Pope Leo XIV addresses the faithful from the balcony of St. Peter's Basilica at the Vatican, Thursday, May 8, 2025. (AP Photo/Alessandra Tarantino)

Nuns react after the announcement of the newly elected Pope Leo XIV at the Vatican, Thursday, May 8, 2025. (AP Photo/Francisco Seco)

Pope Leo XIV appears on the central loggia of St. Peter's Basilica after being chosen the 267th pontiff of the Roman Catholic Church, at the Vatican, Thursday, May 8, 2025. (AP Photo/Alessandra Tarantino)

Pope Leo XIV appears on the central loggia of St. Peter's Basilica after being chosen the 267th pontiff of the Roman Catholic Church, at the Vatican, Thursday, May 8, 2025. (AP Photo/Alessandra Tarantino)

Pope Leo XIV appears on the balcony of St Peter's Basilica after his election, at the Vatican, Thursday, May 8, 2025. (AP Photo/Luca Bruno)

People react as the newly elected Pope Leo XIV appears on the balcony of St. Peter's Basilica at the Vatican, Thursday, May 8, 2025. (AP Photo/Emilio Morenatti)

People react as the newly elected Pope Leo XIV appears on the balcony of St. Peter's Basilica at the Vatican, Thursday, May 8, 2025. (AP Photo/Emilio Morenatti)

Newly elected Pope Leo XIV leaves the balcony of St. Peter's Basilica after addressing faithful at the Vatican, Thursday, May 8, 2025. (AP Photo/Alessandra Tarantino)

An American flag is waved following the election of Pope Leo XIV, at the Vatican, Thursday, May 8, 2025. (AP Photo/Andrew Medichini)

A statue of the Bernini Colonnade frames Pope Leo XIV appearing on the balcony of St Peter's Basilica after his election, at the Vatican, Thursday, May 8, 2025. (AP Photo/Luca Bruno)

Faithful listen the speech of the newly elected Pope Leo XIV at the Vatican, Thursday, May 8, 2025. (AP Photo/Francisco Seco)

Newly elected Pope Leo XIV appears at the balcony of St. Peter's Basilica at the Vatican, Thursday, May 8, 2025. (AP Photo/Alessandra Tarantino)

FILE - Cardinal Robert Francis Prevost, Prefect of the Dicastery for Bishops, poses for a photo at the end of the consistory where Pope Francis elevated 21 new cardinals in St. Peter's Square at The Vatican, Sept. 30, 2023. (AP Photo/Riccardo De Luca, File)

FILE - Cardinal Robert Francis Prevost, Prefect of the Dicastery for Bishops, leads the recitation of the Holy Rosary for Pope Francis' health in St Peter's Square at the Vatican, March 3, 2025. (AP Photo/Kirsty Wigglesworth, File)

FILE - Newly elected Cardinal Robert Francis Prevost, Prefect of the Dicastery for Bishops, right, receives his biretta from Pope Francis as he is elevated in St. Peter's Square at The Vatican, Sept. 30, 2023. (AP Photo/Riccardo De Luca, file)

Newly elected Pope Leo XIV appears at the balcony of St. Peter's Basilica at the Vatican, Thursday, May 8, 2025. (AP Photo/Alessandra Tarantino)

In this photo released by the Diocese of Chulucanas, Bishop Robert Prevost leads an anniversary celebration of the Diocese in Chulucanas, Peru, Monday, Aug. 12, 2024. (Diocese of Chulucanas via AP)

In this photo released by the Diocese of Chulucanas, Bishop Robert Prevost presides over Mass in Chulucanas, Peru, Aug. 12, 2024. (Diocese of Chulucanas via AP)

In this photo released by the Diocese of Chulucanas, Bishop Robert Prevost leads the celebration anniversary of the Diocese in Chulucanas, Peru, Aug. 12, 2024. (Diocese of Chulucanas via AP)

In this photo released by the Diocese of Chulucanas, Bishop Robert Prevost, third from right, poses with members of the clergy in Chulucanas, Peru, Aug. 12, 2024. (Diocese of Chulucanas via AP)