Since they have always adhered to the principle of freedom in those things which were considered nonessentials, it may come as no surprise that diversity marks the worship practices of the Christian Church (Disciples of Christ). Because music and the other arts are not essential elements of belief and because there is no extensive musical heritage, the denomination has always felt free to leave the development and implementation of worship practices to local leaders. Unlike the Church of Christ, the Disciples of Christ permits the use of the organ and other instruments in congregational worship.