“In order that you should remember the day you left Egypt all the days of your life”
How does that enhance our Seder or observance of Pesach? He explains that through the exodus from Egypt our mouths were opened and we were able to sing to and praise HASHEM out loud, as by the splitting of the sea. Prior to that we were not only enslaved to Pharaoh’s forces bodily but we were blocked and unable to express our true spiritual nature. Only later, through the leaving of Egypt did we discover our authentic voices. Our mouths, so to speak, were in Exile! How can a mouth be in exile?
Along comes Pesach and the Seder and with the experience of the Haggada we are lead (A Naggid is a leader) by words to the point where, with the help of four cups of wine, we are singing and crying with hearts full of endless joy as little children sitting on the lap of our Father. It’s quite a profound change from that sober and measured awkwardness that immediately preceded the Seder before we found our voices and our mouths were liberated once again as never before. Understanding that Pesach is “Peh” – mouth “Sach”- speaks teaches us