Ancient Christian mystagogical techniques are gaining new significance in the context of the 21st century. In an age of individualization, the art of being present with oneself, the monastic "Secum esse," becomes a key emotional qualification. Mystagogy works with concrete techniques that lead individuals to emotional and mental autonomy. Mental autonomy, in the context of the media society and its advertising mantras, means having a choice of images and texts that one wishes to internalize. The book introduces the history, social framework, and techniques of Christian mystagogy.