"In every generation one must look upon himself as if he personally had gone out of Egypt ." (Pesachim 116b)
Some 3300 years ago Hashem delivered us from Egypt , from slavery to freedom.
And if Hashem had not taken us out of Egypt then, we would still be slaves there now.
That is why we thank G‑d every day all over again for our freedom, and we promise in our heart to use our liberty in the best possible way, chosen servants of the King of kings.