In every generation, a person is obligated to view himself as if he were the one who went out from Egypt, as it is said: And on that day tell your son, saying, "For this purpose the Lord labored on my behalf, by taking me out of Egypt. "It was not our fathers alone who were delivered by the Holy One, Blessed is He -- we were also delivered with them, as it is said: And He took us out from there in order to bring us -- to give us! -- the land that He pledged to our fathers.

haggadah Section: -- Cup #2 & Dayenu
Source: American