The Nun

Suzanne Simonin narrates her own coerced entry into convent life with the plain, cumulative persuasiveness of someone building a legal case rather than performing suffering for effect, and Diderot uses that restraint deliberately: the horror of watching a family pressure an illegitimate daughter into vows she never wanted lands harder for being reported so calmly. Her passage through three different convents lets Diderot vary the argument rather than repeat it. One superior, Sister Sainte-Christine, punishes Suzanne's resistance with escalating, almost theatrical cruelty and deprivation, while a later one develops an obsessive, physically charged attachment to her that the text renders with unusual directness for its period, desire coded as spiritual devotion right up until it visibly isn't.

Diderot's target isn't faith itself but the specific institutional machinery that converts economic convenience, a family avoiding splitting an inheritance among three daughters, into a lifelong vow no court will let a grown woman revoke. Suzanne's repeated legal appeals to have her vows annulled fail not because her case is weak but because the institutions reviewing it have every incentive to uphold each other, and that structural indifference, more than any single cruel superior, is what the novel keeps insisting is the real crime: a system that can absorb any individual atrocity as long as its own authority stays intact.

Diderot and his circle invented Suzanne's letters as an elaborate prank on the Marquis de Croismare, a friend who had once championed a real nun's legal fight to leave her convent, hoping his sympathy for a fictional case would draw him back to Paris. Croismare fell for it completely, offering the invented Suzanne employment rather than the trip to Paris the conspirators wanted, forcing Diderot to keep the fiction alive with further forged letters explaining her sudden illness, and he only learned the truth years later from one of the other conspirators, by which point he reportedly found the whole elaborate deception genuinely funny. Diderot kept expanding the letters into the full novel anyway, publishing after his own death, so that what began purely as an inside joke on one credulous friend became the era's most direct literary indictment of forced monastic vows.