They took their stand against King Uzziah and said, "Uzziah, you have no right to offer incense to the LORD. Only the priests, the descendants of Aaron, are consecrated to burn incense. Leave the sanctuary, for you have acted unfaithfully; you will not receive honor from the LORD God."
You must distinguish between the holy and the common, between the clean and the unclean,
Significance
Leviticus 10:10 assigns priests the foundational duty of distinguishing between holy (קֹדֶשׁ) and common (חֹל), establishing the conceptual framework for sacred boundaries in Israel. In 2 Chronicles 26:18, the priests invoke this very principle when they confront King Uzziah: "You have no right to offer incense to the LORD. Only the priests, the descendants of Aaron, are consecrated to burn incense." Uzziah's transgression is precisely the collapse of the holy/common distinction that Leviticus 10:10 warns against — a king treating priestly prerogatives as common, accessible to anyone with royal power. The resulting leprosy confirms that the Levitical boundary remains inviolable regardless of political authority.