Latter-day Saints vs. Catholics: Similarities and Key Theological Differences

Latter-day Saints and Catholics share more common ground than either might initially realize. Both traditions claim lineage back to the apostolic church, both emphasize the centrality of Jesus Christ, both maintain structured hierarchies of religious authority, both practice sacred rituals (sacraments or ordinances) that they believe connect the faithful to God's grace, and both see the church as a community rather than merely a collection of individuals. Both traditions have survived centuries, adapted to changing cultural contexts, and maintained that God is actively involved in the direction of His church. Both also emphasize family, service, education, and the importance of living according to moral and spiritual principles.

The deepest theological divergence concerns the nature of God and how His authority works in the church. The Catholic Church teaches that authority flows through apostolic succession -- that the bishops of the church today are the successors of the original apostles, and that the Pope, as the successor of Peter, is the head of the church and the vicar of Christ. This unbroken chain of authority stretching back to Peter is understood as essential to the church's validity and the validity of its sacraments. Latter-day Saints, by contrast, believe that after the original apostles died, a great apostasy occurred in which the church lost divine authority, proper organization, and access to continuing revelation. The Restoration, they teach, brought that authority back to earth through Joseph Smith, whom they believe received priesthood authority directly from heavenly messengers (John the Baptist and Peter, James, and John, according to Latter-day Saint accounts). Authority in the Latter-day Saint church is not understood as something inherited from the apostles through unbroken succession, but as something restored anew in modern times.

This leads to a key difference in how prophetic authority is understood. Catholics believe that divine revelation ended with the apostolic age and the completion of the New Testament. The Pope is understood as a teacher and shepherd of the church, guided by the Spirit, but not as a recipient of new revelation that adds to scripture or changes doctrine. Latter-day Saints, conversely, believe that the President of the Church is a living prophet who receives revelation. Members sustain him as "prophet, seer, and revelator," meaning he receives visions and revelations that guide the church in the present day. This is why changes in Latter-day Saint practice or doctrine (such as changes to temple ordinances, or the extension of priesthood to all worthy male members regardless of race in 1978) are understood as results of continuing revelation rather than merely administrative adjustments.

The priesthood itself is understood differently in the two traditions. In Catholicism, the priesthood is a sacrament conferred through the laying on of hands by a bishop, and priests undergo years of formal training and celibacy is required. The priesthood is highly centralized and restricted to ordained clergy. In the Latter-day Saint church, the priesthood is understood as God's authority to act in His name, and it is conferred on worthy male members at various ages and levels. Local priests (called "Elders" or holding other offices) are typically unpaid, do not undergo formal seminary training, and are usually called to their positions for specific periods before rotating out. There is a small core of full-time, paid, trained leaders at the church headquarters level (the apostles, the First Presidency, and a few others), but the bulk of ecclesiastical work is done by volunteer, lay priesthood holders. This structure reflects a different vision of what the priesthood is and how God's authority should be distributed among His people.

The Catholic sacraments are seven: Baptism, Confirmation, Eucharist, Penance, Anointing of the Sick, Holy Orders, and Matrimony. Each is understood as an outward sign of inward grace, conferring grace on the recipient. Latter-day Saints practice ordinances that are similar in some respects but understood differently: baptism (full immersion, not sprinkling), confirmation (receiving the Holy Ghost through the laying on of hands), and the sacrament (a weekly ordinance in which bread and water are blessed and partaken as a remembrance of Christ's body and blood). Latter-day Saints also practice temple ordinances, particularly endowments and sealings, which are not found in Catholic practice. The Catholic Eucharist/Mass is central to Catholic worship and theology; the Latter-day Saint sacrament, while significant, is one of several weekly ordinances but not the sole focus of worship.

Marian theology represents another significant difference. The Catholic Church teaches that Mary, the mother of Jesus, was "full of grace" and without sin (the Immaculate Conception), that she remained a virgin throughout her life (perpetual virginity), and that she was assumed into heaven body and soul (the Assumption). Mary is venerated as the mother of God and intercedes for the faithful before her Son. Latter-day Saint theology, by contrast, views Mary with respect and reverence as the mother of Jesus and understands her as a faithful daughter of God, but does not teach that she was sinless, does not define her perpetual virginity, and does not accept the doctrines of the Immaculate Conception or the Assumption. Latter-day Saints do not pray to Mary or ask her intercession, believing instead that all prayers should be directed to God the Father in the name of Jesus Christ.

The understanding of the nature of God itself is fundamentally different. Catholics, like most Christian traditions, hold to the doctrine of the Trinity: God is one substance in three persons. Latter-day Saints teach that God the Father, Jesus Christ, and the Holy Ghost are three separate, distinct beings, each with individual bodies (the Father and Son have bodies of flesh and bone; the Holy Ghost is a spirit being). This difference in understanding God's nature leads to different conceptions of God's transcendence and immanence, and different views of how God relates to His creation.

Purgatory is another point of divergence. Catholic theology teaches that after death, souls go to purgatory if they are not yet perfected, where they are purified before entering heaven. Latter-day Saint doctrine teaches of degrees of glory: all who accept Christ will eventually enter one of three heavenly kingdoms, each with its own glory and degree of happiness. There is no doctrine of purgatorial suffering before entering the kingdom of God.

Despite these theological differences, Latter-day Saints and Catholics share common values and can work together effectively on issues of mutual concern. Both traditions emphasize education, humanitarian service, protection of family life, religious freedom, and moral living. Both see the gospel as demanding more than mere intellectual assent -- it requires transformed living. Both believe that God's love is universal and that He desires the salvation and exaltation of all His children.