We say in the Haggadah: "Rabbi Eliezer says, every plague that G-d brought upon the Egyptians in Egypt was comprised of four plagues. Rabbi Akiva says:Every plague that G-d brought upon the Egyptians in Egypt was comprised of five plagues.” What is the logic behind the argument? In this Sicha of the Lubavitcher Rebbe (Likkutei Sichos Vaeira vol. 16), taught by Rabbi YY Jacobson in 1998 in Monsey, NY, shows how this debate mirrors a larger debate about the meaning of chametz on Pesach. Finally, we explore this argument in the psychological and spiritual life of the human being.