This is the first sermon on the Second Commandment.  In it, we consider the way Scripture informs our corporate worship service.  Contrary to the example of Israel in Exod. 32, where the Israelites worshiped the Lord through an image, our worship must not break a command.  And contrary to the example of Nadab and Abihu, where they created their own way of giving God worship and were destroyed, our worship must also keep a command, whether that be an explicit or implicit command.  This approach has been termed "The Regulative Principle of Worship" by the Reformed and Presbyterian tradition.  Those things which are worshipful acts ("elements") require the force of a command, while matters that are necessary for the performance of elements (e.g., time, clothing, location, posture) are culturally-determined by the wisdom of the elders ("circumstances").