Miasma, or spiritual pollution, is a frequently misunderstood concept within contemporary polytheism. While recognized as vitally important to guard against and treat in most traditions, it is nonetheless often ignored or even dismissed as a concern today. And yet, everything good and solid in our practices begins with purification. It is what prepares us for devotional engagement, for encountering the Holy, for developing discernment, for being a practicing and devout polytheist. We can never hope to properly approach our Gods without taking into account the need for cleanliness in our work. This book examines the nature and causes of miasma, sets forth the arguments for taking it seriously, and discusses simple and effective methods of cleansing the body, mind and spirit for both ritual and daily life.