Passover is a holiday of remembrance, of ritual re-enactment: this, we say, is what our ancestors experienced. This is what they felt and knew, what they tasted in their blood. The movement from slavery to liberation, from the soul’s winter to spring. We must never forget, we say, we must always remember, be thankful for our freedom, never take it for granted. “In each generation,” the Haggadah enjoins, “we should feel as if we personally had come out of Egypt.”