In the Haggada, the Rasha asks a question, and the father rebukes him, and the Haggada remarks that the father should הקהה את שניו – knock out his teeth – and rebuke him that אלו היה שם לא היה נגאל – if he had been in Egypt at the time, he would not have been redeemed.
What do his teeth and potential non-redemption from Egypt have to with each other, as part of a cogent reply?
R’ Shlomo Freshwater explains that prior to Matan Torah, people who were evil stayed that way – Yishmael, Esav, all the Jews who died during the 9th plague. Before Matan Torah, the only people God would choose to save were the people who chose God.
After Matan Torah, this changed – Hashem had chosen us unconditionally! This enabled everyone to be saved – even if they weren’t righteous – and any and everyone could do teshuva, as opposed to falling by the wayside like Yishmael, Esav etc.
So what the father tells his son is that if he had been in Egypt, he simply would not have had the merit to be redeemed. But after Matan Torah, anyone can do teshuva – even a Rasha! But a puzzle remains – we just have to “knock out his teeth” – what does this mean?
רשע is gematria 570. If we “knock out” שניו – gematria 366 – we are left with 204. What is gematria 204?
The 4 sons are meant to be allegorical, but clearly this section of the Haggada is an inpirational piece about teshuva – no matter what we have done, we can always make amends, we just need to want it and remove the negativity.