In his inaugural Mass at the Vatican, newly elected Pope Leo XIV called on the Catholic Church to confront the growing global decline in religious belief. Addressing clergy and faithful the day after his historic election as the 267th pontiff—and the first American to lead the Catholic Church—he emphasized the need for renewed spiritual outreach in an era dominated by materialism and secular values.

Pope Leo XIV, formerly Robert Francis Prevost, warned that many individuals are placing their trust in “technology, money, success, power, or pleasure” rather than in faith. He described his role as that of a “faithful administrator” guiding the Church to act as a “light in the world’s darkest moments.”

His election has been met with widespread celebration, particularly in the United States and Peru, where he served in ministry for two decades. In his sermon on Friday, the Pope spoke of regions where Christianity is increasingly seen as irrelevant or outdated, asserting that these are precisely the places where the Church’s missionary efforts must focus.

“A crisis of belief often brings with it a loss of purpose, a diminished sense of compassion, and serious threats to human dignity,” he said, addressing cardinals in the Sistine Chapel. He added that these challenges contribute to family breakdown and broader societal wounds.

The 69-year-old pontiff wore traditional white vestments with gold accents during the Mass, which was broadcast live by Vatican media. Before delivering his homily, he made an unscripted appeal for unity among the cardinals, saying in English: “I know I can rely on each and every one of you to walk with me.”

Echoing themes championed by his predecessor, Pope Francis, Leo XIV emphasized peace and reconciliation. “Let us build bridges through dialogue and unity, not division,” he said.

Global leaders have responded to his election with praise, noting the opportunity for collaboration on pressing international issues. U.S. President Donald Trump described it as a “great honor” for the country to see an American assume the papacy.

Pope Leo XIV previously served as Bishop of Chiclayo in northern Peru and was elevated to the rank of cardinal in 2023. Vatican observers believe his promotion by Pope Francis in recent years may have positioned him as a natural successor.

Known for his progressive views and advocacy for the marginalized, Leo XIV became a Peruvian citizen in 2015 and spent much of his ministry working in impoverished communities. As a cardinal, he did not shy away from political engagement, having criticized elements of U.S. immigration policy and commented on religious discourse in American politics.

His upcoming public appearances including Sunday’s Regina Coeli prayer and a Monday press conference are expected to offer further insight into the vision and priorities of his papacy at a time of global uncertainty and internal Church challenges.