We were slaves to Pharaoh in Egypt, but the Eternal God took us out of there with a mighty hand and an outstretched arm. Had not God taken our ancestors out of Egypt, then we, our children and grandchildren would still be enslaved to Pharaoh in Egypt. Even if we all were wise, and perceptive, experienced, and versed in Torah, it would still be our duty to tell about the Exodus from Egypt. The more one explores the meaning of the Exodus, the more that person is worthy of praise. 

Avadim hayinu, hayinu.
Ata b’nai chorin, b’nai chorin.
Avadim hayinu, ata ata b’nai chorin Avadim hayinu, ata ata b’nai chorin b’nai chorin. 

We were slaves and now we are free. 

haggadah Section: Maggid - Beginning