I just finished reading Samuel Miller's Thoughts on Public Prayer. In it, Miller argues that the Lord’s Prayer—especially the petition, “Thy kingdom come”—is strictly speaking a prayer adapted for the OT economy and is not entirely appropriate for the NT church (page 52). With the Heidelberg Catechism’s positive instruction on the Lord’s Prayer in mind, I disagree with this assessment. What do others think? Is this view common in Presbyterian churches?