Martin Luther’s simple definition of worship remains valid: “nothing else” need ever happen “except that our dear Lord himself may speak to us through his holy Word and we respond to him through prayer and praise.” The essential moments of public worship are reading, preaching (including the presence and proclamation of Christ in the sacraments), and prayer.
Word & World
Paulson, Steven D. “What Is Essential in Lutheran Worship?” Word & World 26, no. 2 (2006): 149–61.
Paulson, Steven D., "What is Essential in Lutheran Worship?" (2006). Faculty Publications. 156.