The story of the Exodus must be told in a spontaneous manner, bursting out of the depths of the heart. One should attain a renewed sense of that feeling experienced by the Children of Israel, as if it were happening here and now.
God's taking the Jewish people out of Egypt with a mighty hand and an outstretched arm made it clear that they had been chosen as the God's nation. When Israel suffers, God's name is desecrated. This fact guarantees the eternal existence of Israel.
The spiritual uplift one experiences during Passover leaves an imprint on the soul which remains fixed there even after the exalted days of the holiday have passed. The state of the soul after Passover in no way resembles its state before Passover.
Matzah is unadulterated by admixtures, like the clothing of the High Priest on Yom Kippur, simple white apparel with no trace of gold. Wearing these plain clothes he enters the Holy of Holies.