The rabbis asked a strange question: why did King Solomon compare Israel to a walnut? Not a cedar, not a vine, not wheat — a walnut.
Rabbi Yehoshua of Sichnan, speaking in the name of Rabbi Levi, gave the first answer. Most trees, when damaged, hide their wounded roots and survive. A walnut tree does the opposite — it exposes its broken roots to the air, and still it lives. So too with Israel. When they try to conceal their sins, they fail. But when they confess openly, they flourish (Proverbs 28:13).
A walnut has four chambers inside its shell. When the Israelites marched through the wilderness, Moses arranged them under four banners, with the Shekhinah (the Divine Presence) dwelling at the center — the camp of the Levites traveling in the midst of the camps (Numbers 2:17).
A walnut delights a baby and adorns a king's table. When Israel was righteous, kings served as their guardians. When Israel sinned, they became a mockery among the nations (Lamentations 3:14).
Drop any other fruit and it falls silently. Drop a walnut, and everyone hears the crack. When a righteous person dies, the sound reverberates across the world. When one Israelite sins, the entire community feels the blow — "Shall one man sin, and You be angry with the whole congregation?" (Numbers 16:22).
Most fruit, once fallen in the dirt, disgusts you. A walnut you simply wash and eat. Even after Israel accumulates transgressions all year long, Yom Kippur (the Day of Atonement) arrives and washes them clean — "For on this day atonement shall be made for you, to purify you" (Leviticus 16:30).
Rabbi Levi added one more teaching. Walnuts come in three types: soft ones that split on their own, medium ones that crack with a tap, and hard ones that resist everything. Israel is the same. Some fulfill the commandments willingly. Some need only a gentle push. And some — even repeated blows yield nothing. But, Rabbi Levi said, the door that does not open for a commandment will eventually open for a physician.