THE CHURCH AS A SOCIAL INSTITUTION. Religion being so crucial a set of social habits, institutions arise for the perpetuation of its traditions, and for the social expression of the religious life. The churches perpetuate the religious tradition in a number of ways. Fixed ecclesiastical systems, recitals and definitions of creeds, the regular and meticulous performance of rites and ceremonies, become powerful instruments for the transmission of religious ideas and standards. Rites frequently performed by men in mass have a deep and moving influence. They have at once all the pressure and prestige of custom, confirmed by the mystery and awe that attends any expression of man's relationship to the divine. The church, moreover, by the mere fact of being an institution, having a hierarchy, an ordered procedure, a definite assignment and division of ecclesiastical labor, becomes thereby an incomparable preserver and transmitter of traditional values. Churches, ecclesiastical organizations in general, may be said to arise because of the necessity felt by men for intermediaries between themselves and the divine. We have already seen of what vast practical moment in savage life was communication with the gods. Upon the success of such addresses to deity, depended not only the salvation of the soul, but the actual welfare of the body--shelter, harvest, and victory. The gods among many tribes were held to be meticulous about the forms and ceremonies which men addressed to them. In consequence it became important to have, as it were, experts in the supernatural, men who knew how to win the favor of these watchful powers. The priests were originally identical with medicine men and magicians. They knew the workings of the providential forces. In their hands lay, at least indirectly, the welfare of the tribe. Their principal duties were to administer and give advice as to the worship of the gods. Often it was necessary for them to point out to the lay members of the tribe which gods to worship on special occasions. The priests being accredited with a superior knowledge of the ways of the gods, they were required to influence the wind and rain, to cause good growth, to ensure success in hunting and fishing, to cure illness, to foretell the future, to work harm upon enemies.[1] [Footnote 1: For a detailed discussion see Hastings: _Encyclopoedia of Religion and Ethics_, vol. II, pp. 278-335.]