The "Carmina Burana" contains numerous poetic descriptions of a raucous medieval paradise (CB 195–207, 211, 217, 219), for which the ancient Greek philosopher Epicurus, known for his advocation of the blissful life, is even taken as an authority on the subject (CB 211). CB 219 describes, for example, an "ordo vagorum" (vagrant order) to which people from every land and clerics of all rankings were invited—even "presbyter cum sua matrona," or "a priest with his lady wife" (humorous because Catholic priests must swear an oath of celibacy). CB 215 even provides an example of the religious rites of this order, the "Officium lusorum", the "Service", or "Mass", "of the Gamblers". In this parody world, the rules of priesthood include sleeping in, eating heavy food and drinking rich wine, and regularly playing dice games. These rules were described in such detail that older research on the "Carmina Burana" took these descriptions literally and assumed there actually existed such a lazy order of priests. In fact, though, this outspoken reverie of living delights and freedom from moral obligations shows "an attitude towards life and the world that stands in stark contrast to the firmly established expectations of life in the Middle Ages." The literary researcher Christine Kasper considers this description of a bawdy paradise as part of the early history of the European story of the land of Cockaigne: in CB 222 the "abbas Cucaniensis", or Abbot of Cockaigne, is said to have presided over a group of dice players.