Nadav and Avihu

According to Seder Olam, the Mishkan (Tabernacle) was erected on the 23rd of Adar during Israel’s second year at Sinai. Over the next seven days, Moses taught the offerings, as well as the daily service performed by the kohanim and Aaron, who would serve as Kohen Gadol (High Priest). Moses also demonstrated how to dismantle and reassemble the Mishkan each day.

Parashat Shemini (Lev. 9:1–11:47) opens on the eighth and final day of this inauguration. The number eight represents completion, but more importantly, it represents elevation above the natural realm—an apt description for the awe-inspiring arrival of the Shekinah. Before this dramatic experience can occur, Moses reminds the kohanim and the people that it is critical to follow HaShem’s direction.

“Moses said: ‘This is what HaShem has commanded that you do, that the Presence of HaShem may appear to you.’”

With those words in mind, Aaron and his sons carefully completed a series of korbanot (offerings). Moses then joined Aaron to enter the Mishkan. When they emerged and blessed the people, a vortex of fire descended upon the altar, consuming the offerings.

No wonder the people fell on their faces, praising the Creator.

This joyful and momentous day came to a standstill when the sons of Aaron, Nadav and Avihu, suddenly approached with “strange fire” and died instantly. There are over ten explanations offered for their demise—everything from intoxication, to refusing to marry, to excessive pride. Yet the Sages also describe Nadav and Avihu as possessing a level of holiness akin to that of their father and their uncle, Moses.

Rather than simple character flaws, it may be that they were so spiritually elevated, so carried away in their devotion, that they forgot a fundamental truth: in certain moments, boundaries are essential to serving HaShem.

The last time Israel came physically close to the Divine Presence was just prior to the giving of the Torah, when the people were repeatedly warned not to draw too near Mount Sinai:

“HaShem said to Moses, ‘Go down, warn the people not to break through to HaShem to gaze, lest many of them perish. The priests also, who come near HaShem, must sanctify themselves, lest HaShem break out against them.’” (Exodus 19:21–22)

Bar Kappara, a sage of the late second and early third century, focuses on specific missteps that could have led to the death of Aaron’s sons. He taught, in the name of Rabbi Jeremiah ben Eleazar, that Nadav and Avihu died because of four things: (1) they drew too near the holy place, (2) they made an unauthorized offering, (3) the fire they used was brought from a common source, and (4) they did not take counsel from one another.

In effect, the brothers followed their own initiative. Even so, HaShem declares:

“I will be sanctified through those who are near to Me, and before all the people I will be glorified.”

As Rashi explains, a stricter level of conduct is required of those closest to HaShem. The fate of Nadav and Avihu reveals that the kohanim—and in truth, all of Israel—must follow the Torah in a prescribed manner. Whether constructing the Mishkan, compounding the ketoret (incense), bringing the korbanot, or simply living one’s life, the details matter. Even an architect knows that if critical specifications are ignored, the structure will collapse.

This principle is underscored when God tells Aaron:

“This is a law for all time throughout the ages: you must distinguish between the sacred and the profane, and between the impure and the pure; and you must teach the children of Israel all the laws which HaShem has imparted to them through Moses.”

The death of Nadav and Avihu stands as a tragic reminder that “the heart is deceitful above all things.” These righteous young men were led astray by their religious fervor, ignoring the clear dictates of HaShem. They attempted to innovate within the Divine service.

Western culture often urges us to “follow your heart,” as if the heart is the ultimate repository of truth. Judaism teaches the opposite: follow the will of God, the Creator of truth—and only then can the heart be trusted to lead.

As the Sages teach: the heart follows action.
To be good, one must first know what is good—and then do what is good.

God values creativity and human contribution. But when confronted with an overwhelming display of Divine power—something far beyond our comprehension—His instructions become even more essential.

It is no coincidence that the laws of mikvah and kashrut are taught in this portion. Whether in what we eat, how we prepare it, or how Divine service is conducted, adherence to God’s instruction preserves holiness. Ignoring it diminishes that holiness—and can even lead to destruction.

Purity in both body and mind sustains life and elevates the soul beyond the natural realm.