The praise of God which constitutes the community and its assemblies seeks to bind and commit and therefore to be expressed, to well up and be sung in concert. The Christian community sings. It is not a choral society. Its singing is not a concert. But from inner, material necessity it sings. Singing is the highest form of human expression. It is to such supreme expression that the vox humana is devoted in the ministry of the Christian community. It is for this that it is liberated in this ministry.
Karl Barth. Church Dogmatics. Ed. G. W. Bromiley, T. F. Torrance. Four volumes, in twelve parts. Edinburgh : T & T. Clark, 1936-1977. Volume 4, part 3, second half, page 866. (quoted by Dr. James Goodloe IV)