Final answer:
The Eucharist is the sacrament that celebrates the Paschal Mystery, encompassing Christ's suffering, death, and resurrection, central to Christian Easter celebrations.
Step-by-step explanation:
The sacrament that celebrates the Paschal Mystery is the Eucharist. This mystery represents Christ's suffering, death, and resurrection, which are central tenets of the Christian faith. The Eucharist, also known as Holy Communion, is based on the Last Supper that Jesus shared with his disciples before his crucifixion, where he blessed bread and wine, giving them as his body and blood (Matthew 26). This sacrament is a re-enactment of the Last Supper and commemorates the resurrection of Christ, observed especially during the Pascha (Easter) when Christians celebrate the resurrection of Jesus Christ on the third day after his crucifixion.
Interestingly, the term 'sacrament' shares roots with the concept of 'Mysteries' from ancient practices and has evolved to be associated closely with Christian rites such as the Eucharist. The Eucharist holds a significance that is deep and multifaceted, serving as a testament to faith, a celebration of Divine grace, and a remembrance of the redemptive power of Christ's sacrifice.