This article reaches out to the audience for controversial religious writing after the English Reformation, by examining the shared language of attainable truth, of clarity and certainty, to be found in Protestant and Catholic examples of the same. It argues that we must consider those aspects of religious controversy that lie simultaneously above and beneath its doctrinal content: the logical forms in which it was framed, and the assumptions writers made about their audiences’ needs and responses. Building on the work (...) of Susan Schreiner and others on the notion of certainty through the early Reformation, the article asks how English polemicists exalted and opened up that notion for their readers’ benefit, through proclamations of visibility, accessibility and honest dealing. Two case studies are chosen, in order to make a comparison across confessional lines: first, Protestant reactions against the Jesuit doctrine of equivocation in the late sixteenth and early seventeenth centuries, which emphasized honesty and encouraged fear of hidden meaning; and second, Catholic opposition to the notion of an invisible-or relatively invisible-church. It is argued that the language deployed in opposition to these ideas displays a shared emphasis on the clear, certain, and reliable, and that which might be attained by human means. Projecting the emphases and assertions of these writers onto their audience, and locating it within a contemporary climate, the article thus questions the emphasis historians of religion place on the intangible-on faith-in considering the production and the reception of Reformation controversy. (shrink)