One Spouse is Enough: Vatican Urges Catholics to Value Lifelong Commitment

Relationships today can feel unsettled, shaped by fast cultural shifts and the constant noise of online life. Against that backdrop, the Vatican has released a new doctrinal Note that invites Catholics to reflect again on what steady, faithful love looks like.

Approved by Pope Leo XIV on November 21, the Dicastery for the Doctrine of the Faith’s (DDF) Una caro. In Praise of Monogamy presents marriage as an “exclusive union and mutual belonging.” The Note encourages families and communities to guide young people toward a mature understanding of love rooted in responsibility and trust.

It also speaks clearly about dignity. The document condemns all forms of physical and psychological violence and insists that genuine love can never override the freedom or identity of the other.

Marriage is described as “an indissoluble unity,” and the Note explains that only two people can give themselves fully and completely to one another. Anything more becomes partial and fails to respect the other’s dignity.

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Approved on the memorial of the Presentation of the Blessed Virgin Mary and presented to the press on November 25, the document connects Christian teaching with contemporary concerns.

The Note identifies several motivations for its publication. Cardinal Prefect Víctor Manuel Fernández writes that today’s “global context of expanding technological power” can lead human beings to see themselves as “creatures without limits,” distancing them from the meaning of exclusive love. It additionally notes the rise of “polyamory,” defined as public forms of non-monogamous unions, in Western countries.

The DDF emphasizes the beauty of conjugal unity, which, with the help of grace, mirrors “the union between Christ and his beloved bride, the Church.” While primarily addressed to bishops, the Note also guides young people, engaged couples, and spouses in reflecting on the meaning of Christian marriage.

Mutual belonging is central. It is “founded on the free consent” of the spouses, reflects Trinitarian communion, and becomes “a strong motivation for the stability of the union.” This is described as “a belonging of the heart, where only God sees,” a place where God may enter without disturbing freedom or identity.

The Note stresses that “the mutual belonging proper to exclusive reciprocal love requires delicate care, a holy fear of violating the other’s freedom, who possesses the same dignity and therefore the same rights.” True love never uses the other as an outlet for frustration and never fills inner emptiness “by exercising power over the other.” It condemns “the many forms of unhealthy desire that lead to explicit or subtle violence, oppression, psychological pressure, control, and ultimately suffocation,” calling these “failures of respect and reverence for the dignity of the other.”

In a culture shaped by “postmodern consumerist individualism,” the Note calls for renewed education in love. “The universe of social media, where modesty vanishes and symbolic and sexual violence proliferate, shows the urgency of a new pedagogy.”

Conjugal charity also extends outward. Couples are encouraged to pursue shared projects that serve others, since fulfillment comes through relationship with others and with God. Pope Leo XIV teaches that the poor are “a family matter” for Christians, not merely “a social problem.”

The Note concludes that “every authentic marriage is a unity composed of two individuals, requiring a relationship so intimate and totalizing that it cannot be shared with others.” Unity forms the basis of indissolubility and allows conjugal love to grow over time. It becomes a “promise of the infinite.”

Click here on how to build a kinder, stronger marriage.