In a world where truth often feels elusive, Pope Leo XIV has spoken out to remind us that science and faith are not enemies but companions in the pursuit of truth. During an audience with members of the Vatican Observatory Foundation, the Pontiff emphasized that the greatest danger to both is not conflict, but the denial that objective truth exists. This message, filled with hope and wisdom, resonates especially in an age when relativism threatens to blur the foundations of our understanding of the world and of God.
Leo XIV, who assumed the papacy in May 2025, has shown from the start a deep interest in the dialogue between science and spirituality. In his address, he underscored that astronomy, in particular, offers a unique bridge between contemplation of the cosmos and scientific rigor. “When we look at the sky, we don't just see stars; we see the work of the Creator,” the Pope said, inviting the faithful not to fear scientific knowledge but to embrace it as a gift from God.
“The heavens declare the glory of God; the skies proclaim the work of his hands.” — Psalm 19:1 (NIV)
135 Years of the Vatican Observatory: Science in Service of Truth
The Pope recalled that 135 years ago, his predecessor Leo XIII founded the Vatican Observatory (Specola Vaticana) with the aim of showing that the Church does not oppose true science but promotes it. Back then, science was emerging as a source of knowledge that challenged traditional narratives. Today, the challenge is different: it is no longer a conflict between faith and reason, but a crisis of confidence in the very possibility of knowing truth.
Leo XIV quoted the words of Leo XIII in the apostolic letter Ut mysticam (March 14, 1891): “Let all see clearly that the Church and her pastors are not opposed to true and solid science, whether human or divine, but embrace it, foster it, and promote it with the greatest possible dedication.” This spirit, he said, remains fundamental to the Church's mission in the 21st century.
Astronomy as a Path to Contemplation
The Vatican Observatory not only conducts cutting-edge astronomical research but also invites believers to marvel at the grandeur of creation. For the Pope, science is not a threat to faith but a tool that can deepen our wonder at God. “Every scientific discovery is like a window opening onto the infinite,” he explained. “It reminds us that we are part of a vast universe, but also that we are loved by a God who drew near in Jesus Christ.”
Relativism: The New Threat to Faith and Science
In his speech, Leo XIV warned against a cultural trend that denies the existence of objective truth. “Today, both science and religion face a threat perhaps more insidious than the old conflict between them: that of those who deny that objective truth exists,” he noted. This relativism, he said, undermines both scientific research and Christian faith, because both are based on the conviction that reality can be known and that there is a truth that transcends our opinions.
The Pope urged scientists and believers to unite in defense of truth. “We cannot allow skepticism to rob us of the ability to wonder and to seek answers,” he said. “Truth is not an abstract concept; it is a person: Jesus Christ, who said, ‘I am the way, the truth, and the life.’”
“Then you will know the truth, and the truth will set you free.” — John 8:32 (NIV)
Science as Service to Humanity
The Pontiff also highlighted the role of science in promoting the common good. Astronomical research, by
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