Rabbi Eliezer and Rabbi Akiva (and Rabbi Yoseph HaGelili) argue about how many plagues G-d smote Egypt with. There are three prohibitions concerning chametz on Passover: Eating, Enjoying, and Owning (Rabbi Yoseph HaGelili maintains that chametz is permissible to enjoy, but not to eat). Rabbi Yehuda mandates eliminating chametz by burning, while the Sages say that it suffices to crumble it into the wind, or throw it into the ocean. The Jerusalem Talmud states an argument whether it is permissible to feed one’s chametz on Passover to an ownerless animal. The Sages sometimes count the Egyptian Exile (Egypt, Elam (Media), Babylon, and Edom (Rome))  as one of our Four Exiles (See Daniel Chapters 2 & 7), and sometimes not (Babylon, Media, Greek, and Edom (Rome)).

However, in essence, all of the above is but one argument, concerning how deep the impurity of the exile effects, whether in the material of the form, or in the original mass itself, thus, how deep our service must be, and thus, how high the redemption will reach. The outcome being, that we are capable to liberate ourselves even from the rawest definition of Self.