On the Shabbos before the Exodus, the Jewish People designated one lamb per household to be the first Korban Pesach and kept it in the home for a few days before Pesach. They would slaughter the lamb and smear the blood on their doors to identify their homes as Jewish, and their families would be saved from the destructive forces in play on the night of the tenth Plague.
On the Shabbos HaGadol, the Shabbos before Pesach, we honor our ancestors following the command to set aside the lamb.
But it doesn’t align with the way we commemorate things in Judaism. Designating the lamb was a one-off instruction in Egypt; it was never performed again, and we don’t do anything to reenact it.
If designating the lamb was small enough that we don’t have a similar ritual, what was the point of the ritual at all?
Designating the lamb was not a symbolic indication of their intent to eat it; our sages teach that lambs were sacred creatures in Egypt, meaning that designating a lamb for sacrifice was also a form of sacrilege to Egyptian deities, upholding the yet unspoken second of the Ten Commandments – to have no other gods or entities.
As R’ Shlomo Farhi explains, it might have been a small gesture, but it was significant because it marked a rejection of Egyptian religion. In a sense, the second commandment to reject other gods precedes the first commandment, awareness of the One God. It is insufficient to add the Creator to the pantheon of gods you believe in; you need to believe in the Creator and no other; designating the lamb was a small gesture with enormous significance. It only follows that for us, the ritual would be empty. We believe in the One God; we don’t believe in other powers.
As the Sfas Emes notes, setting the lamb aside was a one-off instruction in Egypt, never imitated later on in any commandments; it is not the action that we need to remember. Instead, we remember the symbolic move the brave Jewish People took, a tentative but concrete tangible first step.
Shabbos HaGadol also has an element of repentance out of love. Pesach demonstrates the loving relationship between God and the Jewish People; God will act for us before we deserve it. The Jewish People earned eternity and redemption with a token gesture, but a token gesture that gave a foretaste of everything to follow.
Our sages suggest that if a person creates an opening the size of a needle, God can expand the breakthrough into a grand ballroom. Designating the lamb wasn’t a big deal at all, but it doesn’t exist in isolation. In the context of our history, that first baby step meant everything because everything followed from that first step.
A journey of a thousand miles begins with one step.