Principles for WorshipPrinciples for Worship is addressed to the worship of the Christian assembly, which is at the heart of the church’s identity and purpose. The Lutheran confessions describe the church in terms of the worshiping assembly: “It is also taught that at all times there must be and remain one holy, Christian church. It is the assembly of all believers among whom the gospel is purely preached and the holy sacraments are administered according to the gospel.” (from the Introduction)