Responsio ad Lutherum (Reply to Luther)

Henry VIII's Assertio septem sacramentorum (1521), a defense of the seven sacraments against Luther, drew a sharply abusive reply from Luther in 1522. More was asked to answer on the king's behalf. He published under the name Gulielmus Rosseus, which allowed the king's position to be defended without the king himself being drawn into a coarse exchange with Luther. The disguise was thin, and More's authorship was widely recognized. The episode marks More's entry into sustained controversial writing, which later dominated his English works.

More argues that the Church's long continuous teaching, including its unwritten traditions and its interpretive consensus, is a more reliable guide than an individual's reading of scripture. He rejects Luther's principle that scripture alone settles doctrine, contending that it invites endless disagreement and that Luther presents his private interpretation as divine truth. The treatise defends the sacraments, the authority of the pope, and the place of the Fathers and councils. It is an early statement of the argument More would develop in his later English polemics.

The Responsio contains extended and sometimes coarse invective against Luther, which has troubled modern readers, including those who admire More elsewhere. Part of the explanation is that Luther's own reply to Henry had been scurrilous, and More chose to answer in kind. Invective was also a recognized rhetorical mode in humanist and theological controversy. Scholars including Richard Marius have noted the harshness of More's polemic, while others stress its conventional character. Readers should treat the tone as a rhetorical performance shaped by the occasion, not as a complete measure of More's character.

It is the first of More's major polemical works and anticipates themes that recur in the Dialogue Concerning Heresies and the Confutation of Tyndale's Answer: the authority of the Church over private reading, the defense of traditional practice, and suspicion of reformist translation and theology. A difference is language and audience. The Responsio is in Latin and aimed at an international learned readership, whereas the later works are in English and address the wider English public. Reading them together shows how More's argument and his methods of controversy developed over a decade.

That is an oversimplification. The treatise defends the positions of the king's book, but it is a substantial work in its own right, with its own argumentation and rhetorical choices. More's role in the original Assertio has itself been debated, with More later describing his involvement as limited to some editorial assistance. The Responsio is better read as More's own contribution to the controversy, undertaken at the king's request, and as evidence of how his humanist training was turned to theological defense.

The standard scholarly edition is the Yale Edition of the Complete Works of St. Thomas More, volume 5, which presents the Latin text with an English translation and commentary, edited by John M. Headley with translation by Sister Scholastica Mandeville. Because the work was written in Latin and is long, readers should consult the introduction explaining the circumstances and the pseudonym, and should check how the translation handles the invective, since its tone is central to how the work is received.