On the Origin of Error
Heinrich Bullinger's "De origine erroris libri duo" ("Two Books on the Origin of Error") emerged from the fierce theological controversies of the early Reformation as a systematic defense of Reformed doctrine against Roman Catholic teaching. Written in 1539 during Bullinger's tenure as Zwingli's successor in Zurich, this Latin treatise addressed the urgent need for a comprehensive refutation of what Reformers viewed as fundamental errors in Catholic theology and practice. The work reflects the mature phase of Reformed apologetics, moving beyond initial protest to constructive theological argument.
Bullinger structures his argument around the thesis that religious error stems from abandoning Scripture as the sole authority for faith and practice. The first book traces how the early church gradually departed from biblical truth through the accumulation of human traditions, papal claims, and philosophical speculation. The second book examines specific Catholic doctrines and practices—including the Mass, purgatory, clerical celibacy, and Marian devotion—arguing that each represents a corruption of original Christian teaching. Throughout, Bullinger employs patristic sources and church history to demonstrate that Reformed theology recovers authentic Christian doctrine rather than innovating. His method combines careful exegesis with historical analysis, presenting the Reformation not as revolutionary change but as necessary restoration.
The treatise became influential throughout Protestant Europe, translated into German and other vernacular languages for broader circulation. It shaped Reformed apologetic method for generations and influenced the development of systematic theology within Reformed churches. The work exemplifies the scholarly rigor and historical consciousness that characterized Zurich's contribution to Reformed thought, distinguishing it from both Lutheran and radical Protestant approaches.
Who should read this: Scholars of Reformation history and systematic theology will find this essential for understanding Reformed apologetics and anti-Catholic polemic. Readers seeking devotional material or practical spiritual guidance should look elsewhere, as this is a work of theological controversy requiring familiarity with sixteenth-century ecclesiastical debates.