This dissertation describes how the proliferation of “song” as a trope in the vernacular poetic tradition that Michel de Certeau calls “mystic poetics” arises out of the monastic practice of singing the Psalms. Through close readings of John Cassian, Bernard of Clairvaux, Hadewijch, and John of the Cross, it reveals that the ethical formation of the “mystic-poet” is as much a product of theological devotion as it is an attempt to craft a figure of literary exemplarity in the vernacular. Against the characterization of mystical poetry as spontaneous, immediate, and singular, this project argues that mystical poetry and the contemplative life to which it is bound are not removed from the world, but rather firmly grounded in the ritual, embodi...