The debate over where the Israelites placed the Passover blood continues in the Mekhilta, and Rabbi Nathan and Rabbi Yitzchak stake out dramatically different positions — each revealing a distinct theology of what the blood meant.
Rabbi Nathan agrees with Rabbi Yishmael that the blood went on the inside of the doorframe. His proof text is slightly different: "The blood will be for you as a sign" (Exodus 12:13). The key words are "for you." The blood was a sign for the Israelites, not for anyone else. It was a private marker of covenantal identity, hidden from Egyptian eyes, meaningful only to the people who placed it there and the God who commanded it.
But then Rabbi Yitzchak disagrees — forcefully. He insists the blood went on the outside. Why? So that the Egyptians would see it. And not just see it, but understand what it meant. The Passover lamb was an Egyptian sacred animal. Its blood smeared publicly on Israelite doorposts was a declaration of independence from Egyptian religion, an act of spiritual defiance painted in broad strokes for every passing Egyptian to witness. Rabbi Yitzchak's language is visceral: the Egyptians should see their gods being slaughtered, "and their insides be ripped apart."
The contrast between these two readings is extraordinary. For Rabbi Nathan, the blood is about faith — quiet, private, directed toward God. For Rabbi Yitzchak, the blood is about confrontation — loud, public, directed at Egypt. Both readings are preserved side by side in the Mekhilta, because the rabbis understood that redemption requires both: the intimate trust that God sees what is hidden, and the public courage to break with everything that once enslaved you.