Pope Leo XIV calls for a transformation of hearts to build peace

Pope Leo XIV has stressed the importance of a conversion of the heart as a way to address the social and ecological devastation caused by war. In his message for the World Day of Prayer for the Care of Creation, which falls on September 1, 2026, the pope said violence, injustice and harm to the environment are not simply the result of flawed systems. He described them as symptoms of a moral crisis that begins in a divided heart in need of transformation.

"The wounds of war and the degradation of the earth are deeply connected to the condition of the human heart," the pope said. He wrote that the conflicts afflicting humanity are in many ways an outward expression of inner discord and division. "When the heart is distorted, relationships suffer and the structures we build begin to reflect that disorder," he added.

Theme of the Season of Creation

The World Day of Prayer opens the Season of Creation, which ends on October 4, the feast of St. Francis of Assisi, the patron saint of ecology. The theme for 2026 is "They shall beat their swords into plowshares and their spears into pruning hooks," taken from the book of Isaiah. The Vatican said the theme "highlights the connection between armed conflict and environmental degradation" and is an explicit invitation to put development and sustainability ahead of violence and destruction.

The pope said the world is "witnessing many crises and great human suffering," along with an accelerating "disruption of the harmonious balance of creation." These are not separate phenomena, he said, but a single cry for healing and peace rising from a wounded world.

The vicious cycle of war and degradation

Isaiah spoke of a time when nations would turn "what destroys life into what sustains it," the pope said, but today "too often we witness the opposite, as efforts continue to be directed toward violence and war." War leaves wounds far beyond the battlefield, he said, taking lives, tearing families apart and forcing millions to flee their homes.

Armed conflict and environmental degradation together create a "vicious cycle" that "destroys ecosystems, pollutes essential resources such as air and water, and undermines food security," producing further conflict. The pope said war harms not only individuals and communities but the bonds of the human family, revealing "a deeper failure to live in the image and likeness of God."

An ethical and spiritual crisis

"This is not only a political failure, but also a moral and spiritual one," the pope said. "Rooted in distorted desires and in the misuse of human freedom and power, war stands as a countersign to the Gospel of peace." Building a peaceful society requires not only reforming structures but renewing hearts that face "an ethical and cultural crisis," seen in the desire "for domination, the pursuit of immediate profit and the inability to recognize the dignity God has given to every person."

Inner transformation as the path to peace

Isaiah's prophetic call to "turn swords into plowshares" challenges individuals and nations alike to "turn harm into life," the pope said, not only through external change but through a return to God, "who will reorder our desires, heal our wounds and help us grow in virtue." He warned that without "inner transformation, peace will remain fragile and fleeting."

"Where hearts are renewed, new possibilities begin to open. What has been used for destruction can be redirected toward life, toward care for the poor, the feeding of the hungry and the protection of creation," he said. The real tools for building peace are not weapons of destruction, he said, but "truth, dialogue, patience, kindness, justice, mercy, understanding, care and love. These qualities flow from hearts shaped by the Gospel and sustained by the grace of God."