Voltaire's Letters on England opens with a striking portrait of the Quakers, a sect he approaches with a mixture of curiosity and irony. The narrator describes their plain dress, refusal of oaths, and pacifism, noting that they 'wait for the inspiration of the Holy Spirit' rather than follow formal liturgy. This initial focus on religious eccentricity sets the tone for a work that oscillates between ethnographic reportage and philosophical argument.

The Quaker as a Mirror

The first letters dwell on Quaker customs with a precision that suggests firsthand observation. Voltaire notes their aversion to baptism and the Lord's Supper, and their practice of addressing all persons as 'thee' and 'thou.' He recounts a conversation where a Quaker tells him, 'Friend, thou must not think that we are Christians,' a remark that underscores the sect's radical departure from mainstream Protestantism. The narrator's tone is bemused but respectful, avoiding outright mockery. Instead, he uses the Quakers to question established religious authority, pointing out that their simplicity contrasts with the pomp of Catholic and Anglican clergy. This section establishes a pattern: Voltaire presents a specific, often marginal group as a lens through which to critique broader European norms.

Newton and the Vortex of Debate

In later letters, Voltaire shifts from religious to scientific matters, focusing on Isaac Newton's overthrow of Cartesian physics. He explains Newton's theory of gravity with a clarity that avoids technical jargon, describing how Newton 'saw some fruits fall from a tree' and deduced a universal principle. The narrator contrasts Newton's empirical method with Descartes' reliance on 'subtile matter' and vortices, which he dismisses as 'chimerical.' Voltaire's language becomes more assertive here, as he marshals arguments against the Cartesian system: he points out that comets traverse space in directions contrary to the supposed vortex, and that a plenum would create 'insuperable resistance' to motion. This section reveals Voltaire's skill as a popularizer of science, but also his partisan stance—he champions Newton not merely as a scientist but as a symbol of intellectual freedom.

The Rhythm of the Epistles

The book's structure as a series of letters allows Voltaire to modulate pace and focus abruptly. Early letters are anecdotal and conversational, with short paragraphs and direct address to the reader. As the work progresses, the prose becomes denser, especially in the scientific letters, where sentences lengthen and arguments unfold in logical chains. For instance, the letter on Newton contains a single paragraph that runs over 200 words, building a case against vortices through cumulative evidence. This shift mirrors Voltaire's own movement from observer to advocate. The epistolary form also permits digressions: a letter on the English parliament suddenly veers into a comparison with ancient Rome, then returns to contemporary politics. These changes in rhythm keep the reader alert, but they also reflect Voltaire's method of weaving together disparate threads—religion, science, government—into a coherent critique of French absolutism.

Readers should attend to the way Voltaire's voice shifts between letters: the ironic observer of Quaker meetings becomes the earnest defender of Newton, then the sardonic commentator on English liberty. These tonal changes are not inconsistencies but deliberate strategies, each suited to the subject at hand. The letters reward attention to their rhetorical construction as much as to their content.