How the Christian Science Split Forced New Thought to Define Itself

The swift and public rift between Mary Baker Eddy and her student Ursula N. Gestefeld in late 1888 was far more than a personal falling-out; it was the catalytic event that forced the nascent New Thought movement to articulate its own theological and institutional boundaries. Historians have often glossed the break as a quarrel later codified in separate organizations—Eddy’s Church of Christ, Scientist, reorganized in 1892, and Gestefeld’s Church of the New Thought. Yet a careful examination reveals that the split was driven by irreconcilable views of Christianity, truth, and religious practice. This article traces how that rupture compelled New Thought to define itself, moving from a diffuse set of healing practices and metaphysical speculations into a recognizable movement with its own publications, churches, and creedal commitments.

Historical Context

The New Thought movement emerged in the late nineteenth century as a distinctly American religious innovation, born from the confluence of transcendentalism, Swedenborgianism, mesmerism, and the pragmatic optimism of the Gilded Age. Its roots lay in the healing practices of Phineas Parkhurst Quimby (1802–1866), a Maine clockmaker who concluded that illness was a “wrong sum, badly carried” and that conversation alone could correct it (Source 3). Quimby’s method—often called “mental healing”—influenced a generation of practitioners, including Mary Baker Eddy, who studied with him before developing her own system, Christian Science. Eddy’s synthesis, published in Science and Health (1875), claimed to be a complete and final revelation, with herself as the sole interpreter. Meanwhile, other students of Quimby and Eddy—such as Emma Curtis Hopkins, Ursula Gestefeld, and later Charles and Myrtle Fillmore—began to develop more eclectic and pluralistic approaches. The broader intellectual climate was marked by a fascination with science, especially the idea that spiritual laws could be studied and applied as systematically as physical laws. Both Christian Science and New Thought claimed to be “scientific” in their understanding of divine forces, but they diverged sharply on the nature of God, Jesus, and the authority of any single teacher (Source 2). The Protestant mainstream viewed these movements with suspicion, but they attracted thousands seeking healing and a practical spirituality. Into this volatile mix, the Eddy–Gestefeld rupture struck like a lightning bolt, forcing a choice between loyalty to Eddy’s authoritarian revelation and a more open, evolving metaphysical path.

Main Narrative

The Rift: Late 1888

The break occurred in late 1888, when Ursula Gestefeld, a successful healer and writer in Chicago, publicly diverged from Eddy’s teachings. According to the scholarly analysis by the journal Church History, the rift was not a simple personality clash but a “swift and public” event that historians have generally mischaracterized (Source 1). Eddy demanded absolute fealty to her interpretation of Christian Science, while Gestefeld insisted on the right to independent thought and practice. The immediate trigger appears to have been Gestefeld’s publication of Jemima (1888), a metaphysical novel that Eddy deemed heretical. Eddy expelled Gestefeld from her association and forbade her students from associating with her. Gestefeld, in turn, refused to recant and began to gather her own followers, eventually founding the Church of the New Thought in the 1890s. The split was codified in separate organizations: Eddy reorganized her church in 1892 as the Church of Christ, Scientist, with herself as the sole pastor and a rigid governance structure; Gestefeld’s church embraced a more democratic and inclusive model, allowing multiple interpretations and emphasizing individual spiritual growth.

Theological Differences

The article in Church History identifies several incompatible theological positions that drove the two women apart. Eddy held to a strict, exclusive Christianity: she saw Jesus Christ as the unique Son of God and her own writings as the final revelation. She rejected any form of eclecticism or theosophical speculation. Gestefeld, by contrast, was open to a broader spiritual universe, incorporating elements of Theosophy, Eastern thought, and philosophical idealism. She viewed truth as plural and evolving, not fixed in a single book or person. Eddy insisted on the absolute authority of her teachings; Gestefeld championed individual reason and intuition. These differences were not merely intellectual—they shaped ethics, healing practice, and the role of the church. Eddy required members to rely solely on Christian Science practitioners and to avoid medical doctors; Gestefeld allowed a wider range of healing modalities. Eddy’s view of sin and sickness as errors to be denied found no counterpart in Gestefeld’s more affirmative, “New Thought” emphasis on the power of positive thinking and the inherent goodness of creation. As the Church History article argues, these were “profound religious differences,” not personal quarrels (Source 1).

Codification and the Birth of New Thought Identity

The split forced the loose network of mental healers and metaphysical teachers to take sides. Many had been trained by Eddy or influenced by her early writings, but they found her authoritarianism stifling. Emma Curtis Hopkins, who had been an editor of the Christian Science Journal, broke with Eddy in the early 1880s and went on to train a generation of New Thought leaders, including Charles Fillmore and Nona Brooks. Hopkins’s “Scientific Christian Mental Practice” blended Eddy’s insights with a more mystical and inclusive approach. The term “New Thought” itself began to be used in the 1890s, partly as a way to distinguish the broader movement from Eddy’s exclusive system. Gestefeld’s Church of the New Thought, founded in 1894, was one of the first to adopt the name. The movement’s identity crystallized through its publications: Unity Magazine (founded 1889 by the Fillmores), The Nautilus (edited by Elizabeth Towne from 1898), and later Science of Mind (founded by Ernest Holmes in 1927). These periodicals promoted a message of practical healing, positive affirmation, and the immanence of God, while explicitly distancing themselves from Christian Science’s exclusivism. The International New Thought Alliance (INTA), formed in 1914, formalized this network, bringing together diverse groups such as Divine Science, Religious Science, and Unity under a shared affirmation: “We affirm the freedom of each soul to find its own way.” That affirmation was a direct legacy of the Eddy–Gestefeld split, which had demonstrated the dangers of central authority.

Consequences: A Movement Defined in Contrast

The split had several lasting consequences. First, it forced New Thought to define its core beliefs in opposition to Christian Science. While both shared a belief in mental healing and the power of the mind, New Thought emphasized the inherent goodness of creation and the possibility of harmonious living, whereas Christian Science emphasized the unreality of matter and sin. Second, the split encouraged institutional diversification. New Thought never developed a single, central authority; instead, it became a confederation of independent churches and study groups, each with its own emphases. This pluralism became a defining feature. Third, the split opened the door for women to lead without a single male or female autocrat. Gestefeld, Hopkins, Brooks, and later Myrtle Fillmore all exercised significant leadership. Fourth, the split shaped the movement’s relationship to science. Both movements claimed to be scientific, but New Thought’s science was more empirical and open-ended, allowing for adaptation and growth. As Source 2 notes, New Thought groups understood themselves as premised on “scientific understandings of the world and of the divine forces,” but they applied that science in a less dogmatic way than Christian Science. Finally, the split accelerated the movement’s engagement with broader currents of thought, from transcendentalism to Theosophy, creating a syncretic spirituality that anticipated the New Age movement of the late twentieth century.

Why It Matters in New Thought History

The Eddy–Gestefeld split is the hinge on which New Thought’s self-definition turns. Before 1888, the movement was a diffuse collection of healers and teachers, many of whom still considered themselves Christian Scientists. After the split, it became necessary to articulate what made New Thought distinct—not only from Christian Science but from other metaphysical traditions. The split forced New Thought to confront questions of authority, revelation, and the nature of truth. By rejecting Eddy’s claim to exclusive revelation, New Thought embraced a democratic epistemology: truth is available to all, and each individual has the right to interpret spiritual reality. This commitment to intellectual freedom became the movement’s hallmark and a key reason for its appeal in a pluralistic society. The split also shaped the movement’s institutional forms. Rather than a single church with a hierarchical structure, New Thought developed a network of federated societies, schools, and periodicals, united by shared principles but not by a common creed. The International New Thought Alliance’s affirmation of “freedom of each soul” is a direct legacy of Gestefeld’s refusal to submit to Eddy. Today, students of New Thought history study the split to understand how movements define themselves in times of crisis. The split demonstrates that theological differences, not just personal ambitions, can drive religious change. It also illustrates the role of women in shaping American religious life, as both Eddy and Gestefeld wielded considerable power and influence. The split ultimately enriched the New Thought movement by forcing it to clarify its message and to embrace a pluralism that would allow it to grow and adapt over the next century.

Primary Sources

• Ursula N. Gestefeld, Jemima (1888) – A metaphysical novel that triggered the split; reveals Gestefeld’s early divergence from Eddy’s theology.
• Mary Baker Eddy, Science and Health (1875, with later editions) – The foundational text of Christian Science, against which New Thought defined itself.
• Emma Curtis Hopkins, Scientific Christian Mental Practice (c. 1890s) – A course of lessons that trained many New Thought leaders and articulated a middle path between Eddy and Gestefeld.
• Charles and Myrtle Fillmore, Unity Magazine (from 1889) – The leading periodical of the Unity School, which became a major New Thought denomination.
• International New Thought Alliance, Declaration of Principles (1914 and later) – The official affirmation that codified the movement’s pluralistic identity.
• Horatio W. Dresser, A History of the New Thought Movement (1919) – A contemporary account that places the split in the context of kindred movements (Source 4).