terms: Hagada=Passover night liturgy
Kashrus=dietary laws
Tahars=laws of family purity
Jews remember in the Divrei Negidim (in the book of Exodus part)
3-fold subjugation of Israel by Egypt
1.they were in Exile (strangers in a strange land)
2.They were enslaved in exile
3.They were tortured physically and mentally
as 4 signifies completion they remember the four expressions of freedom...this fullness that is the final stage of development and made them a nation with a purpose
4 expressions of freedom (exodus 6:6-7)
God says
1. I shall take you out from your burdens of egypt
2.I shall rescue you
3.I shall redeem you
4.I shall take you to me.

In this God tells them that he will take them to him as a nation. It is at this point in time that GOd makes the Jews his chosen people.

Because of the disgrace and disrespect that Cham (Ham) showed Noach (Noah) he was cursed. His decendants the slaves of his brothers. In egypt the Jews were in effect the slaves of slaves. How much lower is there?
And God raised them up. God took them and made them his chosen people.
It is this journey, from slave to freedom and God that passover celebrates.
MAtzo represents the bread they ate as slaves and their hasty departure from egypt
Maror...the bitter herbs...to remember the bitterness of being slaves
They dip the bread twice and
recline when eating because reclining is the act of a noble man. There is the cup for Eiljah in memory that he will return.
there are 4 questions asked. THe first is:
Why is this night different from all {other} nights?
4 cups represent the 4 expressions God uttered upon freeing his people from egypt.

Also remember that it was during the sabbath that Christ was sacrificed. THere were 2 sabbaths that week. The yearly Sabbath of Passover and the weekly sabaath on saturday.