Who decides the correct and fitting manner to worship God? Just because others worship in a certain way, which may be seemingly worthwhile, if that approach was not commanded by God, it is out of bounds. Comparing the biblical narrative of the binding of Isaac to the story of the deaths of Aaron’s sons clearly teaches that God’s will and His will alone determines what is appropriate and beloved by God and what is not. The severity and swiftness of the punishment in the case of Nadav and Avihu powerfully demonstrates that even religious acts conducted with apparently worthy intentions can be unacceptable manifestations of fulfilling God’s will if they fall outside of mandated religious practice.
“And the Lord spoke unto Moses, after the death of the two sons of Aaron, when they drew near before the Lord, and died” (Leviticus 16:1).