Christ our Passover has been sacrificed, alleluia; therefore let us keep the feast with the unleavened bread of purity and truth, alleluia, alleluia (Communion Antiphon, Easter Sunday, The Roman Missal).
On this holiest of days, we celebrate the Resurrection of our Lord and Saviour Jesus Christ, the crowning truth of our faith. Our solemn celebration of Paschal Triduum began on Holy Thursday with the evening Mass of the Lord’s Supper during which we contemplated the gift and mystery of the Holy Eucharist in which Jesus gives Himself to us and remains with us in the most Blessed Sacrament of the Altar. During these three days we have commemorated the Easter mystery in all its depth and detail. We know, however, that each time we participate in the Holy Sacrifice of the Mass, the fullness of Good Friday, Easter, and Pentecost is conveyed to us. Each time we participate in the sacred mysteries, the Pascha Domini (the Passover of the Lord), we die with Christ, we rise with Him and receive from Him the Spirit of Promise who transforms us and unites us to the Father in and through Christ (Fr. M. Louis Merton, Seasons of Celebration). The Mass is the Paschal Mystery. So we must always celebrate the Mass, any Mass with the unleavened bread of purity and truth; that is to say, with faith and devotion, reverence, gratitude, and love.
Today’s Mass, solemnly and joyfully celebrated, is like every other Mass and yet, it is different in one unique and absolutely critical aspect. At every Mass, in the offering of the Sacrifice, the action of Christ makes present the offering of Christ our Saviour on the Altar of the Cross. The unbroken, orthodox tradition of the Church does not deviate from the affirmation of this truth. At every Mass we are physically at the foot of the Cross and our Lord provides everyone who loves Him with an opportunity to be with Him on Calvary. The Psalmist prophesies of the Lord in His Passion: “I looked for pity, but there was none; and for comforters but I found none. They gave me poison for food, and for my thirst they gave me vinegar to drink” (Ps 69:20-21). In the Mass, in every Mass, we are present with our Lady and our Lord’s most faithful followers in the one offering made for the world’s salvation. Our Lord Himself had prophesied: “And I, when I am lifted up from the earth, will draw all men to myself” (Jn 12:32). In Himself our Lord brings to perfection all mysteries, so that there is one sacrifice and also one kingdom gathered from all peoples (Cf. Pope St. Leo the Great, Sermo 8 de Passione Domini).