“In the churches only the 150 Psalms of David, the Ten Commandments, the Lord’s Prayer, the Twelve Articles of Faith, the Songs of Mary, Zacharias and Simeon, the Morning and Evening Hymns, and the Hymn of Prayer before the sermon shall be sung.”(Article 69, D.K.O.) The Christian Reformed redaction of this article of the Church Order is as follows: “In the churches only the 150 Psalms of David and the collection of hymns for church use, approved and adopted by Synod, shall be sung. However, while the singing of the Psalms in divine worship is a requirement, the use of...