The Catechism in Questions & Answers

616. How did Christian divine service develop further?

The Christian divine service had a liturgical character for centuries. This means that the divine service was predominantly defined by rituals, namely firmly established words and hymns. This changed in many religious denominations after the Reformation.
For them, the sermon became the focal point of the divine service. New Apostolic divine service adheres to this tradition with a sermon that is delivered without notes.

Sermon, proclamation of the word: see Questions 623. et seq. Reformation: see Questions 595. et seq.