The relationship between sacrifice and sanctity is a major theme in “The Wood at Midwinter,” embodied by Merowdis’s journey as she embraces her role as a saintly figure. Susanna Clarke portrays sanctity as a path that requires extraordinary acts of devotion and a willingness to endure personal hardship. Through Merowdis, Clarke explores the idea that true holiness is not about conventional morality or societal approval but about selflessness, connection, and the courage to face profound transformation.

Merowdis’s sanctity is evident in her spiritual connection to nature and her ability to communicate with animals, which sets her apart from others. The story shows that her parents and society view her choices as eccentric or even impractical, yet Merowdis remains steadfast in her beliefs. Her rejection of marriage to George Blachland and her vision of a bear cub—symbolic of her impending sacrifice—highlight her defiance of societal expectations in favor of a deeper, spiritual purpose. This unwavering dedication to her path aligns her with the concept of sainthood, where personal suffering is often intertwined with divine joy.

Clarke explicitly ties Merowdis’s sacrifice to religious imagery, as seen in her comparison of herself to the Virgin Mary: “It will be bitter cold and there will be pain.