What is the paschal mystery?
The Paschal Mystery, is the death, resurrectin and ascension of our Lord into glory. The Paschal Mystery is the central mystery of the Christian Faith, celebrated at the Easter Triduum with a sublime and unique solemnity.
The Term 'paschal' is derived from the word 'pasch', not simply because the events from the Last Super through the crucifixion and resurrection of Christ happened to coincide with Passover. The event celebrated by Passover -- the deliverance of Israel from enslavement in Egypt -- is itself the anticipation of the full deliverance won by Christ for the whole human race.