This dissertation suggests that Ralph Waldo Emerson's sermons may be fruitfully read as Christian mystical texts in light of Bernard McGinn's discussion of Western Christian mysticism. More specifically: Emerson's sermons, read systematically with McGinn's historical survey in mind, describe the preparation, pursuit, experience and expression of a mystical encounter with the Divine. By re-configuring McGinn's historical snapshots into systematic searchlights, this dissertation explores and maps the mystical depths of Emerson's sermons, combing them for elements of his mystical-theological anthropology, his mystical Christology, and his mystical homiletics. The fruit of our effort is revealed in what we will call the sublime unselfing of Emerson's sermons.