Normative Principle of Worship vs. Regulative Principle of Worship Our Order of Service explained: 8 Key Elements— INVITATION [Call to Worship, scriptural] ADORATION [Singing of Psalms, Hymns, and Spiritual Songs] CONFESSION [Confession of Sin] ABSOLUTION [Assurance of Pardon Lord’s Supper] PROFESSION [Professing our Faith Catechisis] PROCLAMATION [Preaching of the Word] SUPPLICATION [Prayers of the People / Pastoral Prayer] COMMISSION [Benediction Sending]