Associated with sacrifice and prayer, and partaking at once of the characters of magic and mystery, is the sacred dance. Rhythmic movement of body and limbs readily becomes the expression of strong feeling; and the feeling in its turn may be reawakened by the solemn renewal of the action. When it imitates the motions of the warrior or the huntsman it comes to possess a magical value, and the women who remain at home will dance all day while their husbands are engaged in battle or the chase. Does it not quicken their courage or enhance their skill? The child in an elementary school now learns {167} his action-songs, and sows the grain and reaps the harvest. He does not, however, suppose that he is promoting nature's work. But the women whose social progress has advanced to agriculture, instead of imitating the gambols of the wolf or bear, will celebrate the operations of the fields to stimulate their effectiveness, and at a later stage still will go forth into the vineyards with timbrel and song. There are dances for courtship and marriage, dances in initiations and mysteries, dances even for the funeral. There are solemn preparations, as in the snake-dance of the secret order of the Snakes among the Moquis of Arizona, when the members must not only wash the snakes, but themselves as well and everything about them (in the same water), and fast for one day. Then any one who has been bitten will be healed, and when the pipe is lit, the clouds from it will rise and form rain-clouds, and the rain will fall upon the altar and the sacred things. Or the dance will serve for the reunion of the tribe, and becomes a great social as well as a religious institution. The Sun-dance of the Blackfoot Indians (p. 35) is the supreme expression of their religion, and their great annual religious gathering. It must originate in a woman's vow for the recovery of the sick, and the ceremonies are spread over a considerable time. Some come for enjoyment, some to fast and pray. Some must discharge their vows for the healing of sick kinsfolk; others pay the price of deliverance {168} from peril by the infliction of self-torture in the sun-lodge.