Surfing the Waves of Emuna During Pesach

Five years of digging, a tunnel five kilometers long, and a prison break that finally works. One man stays behind, and the question that follows him is the one we all face. Before the Seder, the Torah's wording raises its own puzzles. Why does the Ramban stress that Pesach, like Shabbos, must be guarded? Why does the Torah even call Pesach "Shabbos" in the count of the Omer? And why the extra care for every mitzvah of the night? The Chofetz Chaim's idea about Shabbos connects them, and says what to prepare for the Seder.