We can suggest that doing the Ratzon Hashem makes you a soldier. A “soldier” is a person that follows orders. Matza represents the “fight” against the Yetzer Hara. You control your Ta’avos and you beat your desires; akin to when you bang the Matza and you don’t let it blow up. A Mitzri does whatever he wants, whereas a Yid has to fight, and be on guard to control himself. A human being was created to grow, by fighting his Tevah (nature). This constant struggle is the biggest thrill in life, and the biggest Simcha is to fight against the Yetzer Hara. People who are addicted to sin get depressed. There was once a drunkard who took a bottle of some good whisky and smashed it; this made him feel like a million dollars. A human is a piece of Hashem. He wants Gevura, and that we should become great like Hashem, the “Creator” of the world. Going against your nature is the biggest form of a human’s creativity.
It also says the words: צִׁ בְ אוֹתֵֵה' the soldiers of Hashem when they finished the Korban Pesach. A soldier doesn’t do what he wants, and that’s his greatness. That’s why we needed a Bris Mila before the Korban Pesach, because the Bris Mila symbolizes going against Z'nus, and giving ourselves a Bris symbolizes creating in ourselves the ability to fight and overcome our Middos. That’s our whole life: עִׁ יקָ רֵ חִׁ יוּתֵֵהָ אָ דָ םֵשְ בִׁ ירַ תֵהַ מִׁ דוֹתֵוְאִׁ יֵל ֹּאֵלָ מָ הֵלוֵֹחַ יִׁים Shviras HaMiddos, and without it, what is the point of living? (Gr”a).
