It is not only our ancestors that God redeemed from Egypt, but each and every one of us as well.

In each and every generation a person must view himself as though it was he who went out of Egypt, as it is stated: “You shall tell your son on that day, saying: It is because of this that the Lord did for me upon my exodus from Egypt” (Exodus 13:8). (Mishna Pesaĥim 10:5)