Of these divisions the _précis_ now extant, and collected for the first time by the Danish scholar Westergaard, comprise the following books: First, the _Yasna_, which sets before us the devotions proper to be offered in connection with the sacrificial ceremonies. This Yasna is divided into seventy-two chapters, representing the six Yahânhârs, or “seasons” during which Ahura-Mazda, the Good Principle, created the world. The reader will here note the coincidence between the six creative seasons of the Magian seer, and the six creative days of the Hebrew lawgiver. The Yasna consists of two parts, the older of which is written in what is called the Gâtha dialect, and had acquired a peculiar sanctity prior to the date of composition of the other books. It may be described as a treasury of songs, hymns, and metrical prayers, which embody a variety of abstruse reflections upon subjects of metaphysical inquiry, and are much better adapted to stimulate the intellect of the student than to foster the devotion of the worshipper. They are rhymeless, like the poetical effusions of Cædmon, and in their metrical structure bear a curious resemblance to the Vedic hymns. Of these collections, or Gâthas, there are five, and their leading title seems to be: “The Revealed Thought, the Revealed Word, and the Revealed Deed of Zarathustra the Holy.” It is added that the Archangels first sang the Gâthas. Their general purport is an exposition of the work and teaching of the great founder of Magianism, who is represented as inveighing against a belief in the _devas_, or gods, and exhorting his disciples to lift up their hearts only to Ahura-Mazda, the Supreme Goodness.