This study focuses on the ritual ‘conservatism’ of Henry VIII's Reformation through a new look at biblical exegeses of the period dealing with sacred music. Accordingly, it reconsiders the one extant passage of rhetoric to come from the Henrician regime in support of traditional church polyphony, as found in A Book of Ceremonies to be Used in the Church of England, c.1540. Examining the document's genesis, editorial history and ultimate suppression by Archbishop Thomas Cranmer, it is shown that Bishop Richard Sampson, Dean of the Chapel Royal (1522–40), was responsible for the original drafting of the musical paragraph. Beginning with Sampson's printed commentaries on the Psalms and on the Epistles of St Paul, the literary precedents and historical continuities upon which Sampson's topos in Ceremonies was founded are traced in detail. Identified through recurring patterns of scriptural and patristic citation, and understood via transhistorical shifts in the meaning of certain key words (e.g. iubilare), this new perspective clarifies important origins of the English church's musical ‘traditionalism’ on the eve of the Reformation. Moreover, it reveals a precise species of exegetical method – anagogy – as the literary vehicle through which influential clergy were able to justify expansions and elaborations of musical practice in the Western Church from the high Middle Ages to the Reformation.