When the Hasidim of Kotzk prayed, they did not move. Any external sign of piety was deemed pretentious. The story is told of a great student, who after one prayer session -- though someone observing from the side would not even have noticed that he was praying -- was bathed in sweat and had actually cracked two of his teeth.
Jewish ritual is meant to be experiential -- something that simultaneously catapults us backwards in time and propels us forward in anticipation of the future. When we sit at the seder we are attempting to connect with the Power that makes for freedom, identify that force within ourselves and the Universe to bring about redemption.