God must be strictly regulated, or governed, by God’s Word. This is, after all, exactly the lesson that David learned between his failed attempt and his successful effort to bring God’s ark to the royal city. The same lesson had been taught generations earlier to Aaron when his sons engaged in a worship innovation at the tabernacle. According to Numbers 3:4, Aaron’s sons Nadab and Abihu “offered unauthorized fire before the LORD” and were slain by God. We do not know exactly what “unauthorized fire”