In Every Generation, every individual must feel as if he or she personally came out of Egypt. It's not our ancestors alone whom G-d redeemed, he redeemed all of us with them. 

What does it mean for each one of us to regard ourselves as have personally gone out of Egypt? The Hebrew word for Egypt is Mits'rayim (מצרים), which has the root Tzar (צר), which means narrow and constrained. So, to say we must leave Egypt is also to say that we must struggle to break out of the inhibitions and constrictions of our minds and free ourselves to attain our full spiritual, emotional, and psychological potential. The Jews wandered in the desert for 40 years so that they could break free of their slave mentality, and we should too. 

haggadah Section: -- Cup #2 & Dayenu