This essay situates Mary Astell’s understanding of women’s moral freedom in the context of her under-studied vocabulary of “Epicurism.” It foregrounds Astell’s engagement with two contemporaneous accounts of the will, both of which can be broadly characterized as hedonistic. On the first, developed by John Norris (1688, 1693), God ensures conformity between his will and the human will by endowing agents with a love of pleasure that moves them in his direction. On the second, delineated by John Locke (1690), human wills are motivated by a morally neutral desire for pleasure, which acquires moral significance only when agents exercise their power of freedom or bring their reason to evaluate the goods that give them pleasure. In her writings of the 1690s, Astell develops a feminist ethics that is far closer to Locke’s than has been recognized. Like Locke, and unlike Norris, she suggests that agents are themselves responsible for aligning their wills with God’s, and they must do so by cultivating reason and a taste for virtuous pleasures. In a distinctively feminist move, she maps how patriarchal society corrupts women’s wills by directing their desires to sense-based goods only, preventing them from achieving the happiness due to them as rational beings. While Astell is routinely characterized as a rationalist philosopher, she is a rationalist who, like Locke, is highly aware of the limits of reason, and deeply interested in the potential of agents to transform their likes and dislikes so that they find pleasure in the exercise of virtue.