“Another peculiarity of the Reformed Presbyterian Church is that no instruments of music are used in divine worship. They believe that instruments were used in the tabernacle and temple worship by the Levites, and at the time of the offering up of sacrifices by the priests. As these services were wholly typical and were done away with at the coming of Christ, so also all the accompaniments and material supports of that service. At the advent of Christ the building was completed. and the scaffolding was taken down. Christ and the Apostles never used an instrument of music in the synagogue worship, although they used the Psalms. If instruments had been necessary to acceptable worship, the example or direction of Christ in this matter would have been given. Christ requires a spiritual service—the melody of the heart with the fruit of the lips. The leading writers and fathers of the Church give instruments no place in the worship. They were introduced by Pope Vitalian, in A. D., 660, to “augment the eclat of religious ceremonies.” Being of Romish origin, all true Protestants should look upon the innovation with suspicion.
The true principle of Christian worship is “What has the Lord required,” and not what He has not forbidden. All Presbyterians recognize the Westminister standards, and the Confession of Faith says we are to “sing Psalms with grace in the heart,” and “the acceptable way of worshipping the true God is instituted by Himself, and is so limited by His own revealed will that He may not be worshipped according to the imaginations and devices of men.” It is an admitted fact that instruments and operatic choirs destroy congregational singing, and substitute a meaningless service for that which every heart should render unto God. Instruments are used for the express purpose of making the service attractive, and the praise offering is often rendered for the worshippers by those whose lips and hearts have never been touched by the love of God. When the worship is thus rendered by machinery, God is robbed of that heart service and spiritual communion which each worshipper should have with Him in the ordinances of grace.”
From The History of the Reformed Presbyterian Church of North America by William Melancthon Glasgow, p59.