Kabbalah su Esodo 12:19

Now we need to examine this - on Passover Israel is removed from the bread that is called chametz (leavened), as it is written (Exodus 13:7) "and you shall not see any leavened bread", and it is written (Exodus 12:19), "for anyone who eats leavening etc." What is the reason for this? Because of the preciousness of that bread which is called matzah. For now that Israel has merited a more elevated form of bread, is it not therefore appropriate to do away with chametz and make it completely invisible? But why, then, does this offering [on Shavuot] include chametz? As it is written, (Leviticus 23:17) "it shall be a measure of choice flour, baked with leavening." And furthermore, on this day when the evil inclination is vanquished, and the Torah - which is called "freedom" - is present?