This chapter traces the indebtedness of John Webster's The Duchess of Malfi to Epictetian philosophy. For Epictetus, those who assent to false impressions, or phantasiai, enslave themselves, lessening their humanity. Conversely, those who reject false impressions remain free and fully human, however physically enslaved they might otherwise be. While the doctrines of Epictetian philosophy may seem a retreat from the political sphere into the untouchable recesses of an imperceptible interiority, Webster's play reveals the threat such a radical notion of liberty might pose to a repressive political system. For the playwright subtly depicts the prospect that solidarity across the various strata of society, built upon a shared sense of interior liberty, could prevail, where secret defiance and violent rebellion had not, in displacing systemic inequity. By aligning Bosola's revenge, as well as the Duchess' remarriage and death, with a strain of Epictetian prohairesis, Webster tethers the play's multiple acts of resistance into a complex yet coherent ontological ground. In doing so, he figures the imperceptible stirrings of human volition as a potent political force – if distributed broadly among the dehumanized and dispossessed – rife with revolutionary potential.