The Catechism in Questions & Answers

623. What do we mean by the “proclamation of the word” (sermon)?

God’s word is proclaimed in the divine services. Ministers express thoughts inspired within them by the Holy Spirit. This is called the “proclamation of the word” or the “sermon”.
In New Apostolic divine services, the sermon is not read from a previously prepared text. It is based on a passage from the Bible, on which the officiating minister elaborates in free discourse without notes.