Leviticus 18:5b (the one doing them shall live in them) offers a prism through which to view the idiom of Scripture—the distinctive dynamics and theology of the Bible. The verse pinpoints the interplay between God's doing-and-living and ours. At issue is whether the commandments reflect a “command-and-do” structure of life with God, which maximizes a quid pro quo dynamic between God and us; or do the commandments delineate a “covenant place where” we abide with God and God with us, as a gift of shared doing pure and simple? The article traces Leviticus 18:5b through both Old and New Testaments, to show how pervasive it is. The main post-World War II English translations misstate the verse at every turn, in contrast to the 16th-century Church Reformation, which understood the verse and the issue under the topic of Law and Gospel.