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Haggadah Shiur 5779 - #1
The command of ושמרתם את המצות - to guard the matzot - doesn't only include keeping the matzah chametz-free but also ensuring that it's baked לשמה. Machine shmurah matzah and issues of לשמה.
The connection between the three seemingly-unrelated statements made in Ha Lachma Anya.
בינה לעיתים: The ארבע לשונות של גאולה and the four types of oppression from which we were rescued.