There are two times when we set a "place" on this earth for Eliyahu Hanavi--at a bris, and at the Seder. We explore the connection between these two important times. When a child receives a bris, he is brought into the covenant of Hashem. At the Seder, we teach about our past so that we can continue carrying on this covenant into the future. This power of Eliyahu, preserving the future through being zealous for Hashem, is evident in both of these occasions. When the final geulah comes, Eliyahu will return the hearts of fathers to children and children to their fathers, in line with what he has been doing all along.