The Seder has 15 parts, corresponding to the fifteen steps which ascended to the Temple. Our Sages say that our table is like an Altar, and this is particularly true on Seder-night, when our family table is a tool to achieve new spiritual heights. Similarly, just as the Temple helped the Jewish People sense the Divine Order in the world, so too, the Seder, the Hebrew word for order, is a reminder that God guides world history.
