"Worship the Lord." Too many churches assume that those in their pews and those who pass through their doors know what worship is and why the Lord commands it. The purpose of this booklet, then, is to educate and acquaint members of Reformed churches but most of all those who inquire within their walls, with a basic knowledge of what Reformed churches mean when they say, "Worship the Lord." In knowing what to expect, the worshippers' response of praise and thanksgiving will be more active, joyful, and meaningful.