"While it is admitted that there is a form of government prescribed or instituted in the New Testament, so far as its general principles or features are concerned, there is a wide discretion allowed us by God in matters of detail, which no man or set of men, which neither civil magistrates nor ecclesiastical rulers can take from us."--HODGE. Chapter I. The Law and the Liberty of Presbyterian Worship. "The Word of God, which is contained in the Scriptures of the Old and New Testaments, is the only rule to direct us how we may glorify and enjoy Him."--WESTMINSTER CATECHISM. The Church of Christ, as a divine communion, exists in the world for a definite and appointed purpose. This purpose may be declared to be twofold, and may be described by the terms "Witness" and "Worship." It is the evident design of God that the visible Church should bear witness to His existence and character, to His revelation and providence, and to His grace towards mankind, manifested in His Son, Jesus Christ. To Israel God said, "Ye are my witnesses," and to His disciples forming the nucleus of the New Testament Church, the risen Saviour said, "Ye shall be witnesses unto Me." Side by side with this evident end of the Church's existence is the other one of Worship. Not only from the individual heart does God require ascriptions of praise and expressions of confidence, but from the organized congregation of His people, He desires to hear the voice of adoration, contrition, and supplication. The cultivation of such worship, and the offering of it in a manner acceptable to God, is a work worthy of the Church's most earnest care. It is to be expected, therefore, that in the Word of God there shall be found the principles of a cultus which, possessing Divine authority, shall carry with it the assurance of its sufficiency for the ends aimed at, and of its suitability to the requirements of the Church in every age. That the word of God contains such principles clearly indicated, the Presbyterian Church has always maintained, teaching uniformly and emphatically that Holy Scripture contains all that is necessary for the guidance of the Church, as well in matters of Polity and Worship, as in those of Doctrine. Divine worship, therefore, neither in its constant elements nor in its methods, is a matter of mere human device, nor is the Church at liberty to devise or to adopt aught that is not explicitly stated or implicitly contained in the Word of God for her guidance.