Mechthild's Book consists of visions and revelations about liturgical feasts, saints, and the Blessed Virgin, along with many other revelations experienced by the mystical nun as recounted to her sistersespecially her close friend, St. Gertrude the Great. These visions reveal the deeply communal, optimistic spirituality of the Helfta nuns, which revolved around their sacramental and liturgical life and asserted strong, durable bonds between the living and the dead.