On the basis of this new meaning of the Paschal feast, we can also understand Saint Paul’s interpretation of the “leaven”. The Apostle is referring to an ancient Hebrew usage: according to which, on the occasion of the Passover, it was necessary to remove from the household every tiny scrap of leavened bread. On the one hand, this served to recall what had happened to their forefathers at the time of the flight from Egypt: leaving the country in haste, they had brought with them only unleavened bread. At the same time, though, the “unleavened bread” was a symbol of purification: removing the old to make space for the new. Now, Saint Paul explains, this ancient tradition likewise acquires a new meaning, once more derived from the new “Exodus”, which is Jesus’ passage from death to eternal life. And since Christ, as the true Lamb, sacrificed himself for us, we too, his disciples – thanks to him and through him – can and must be the “new dough”, the “unleavened bread”, liberated from every residual element of the old yeast of sin: no more evil and wickedness in our heart.
“Let us celebrate the feast … with the unleavened bread of sincerity and truth”. This exhortation from Saint Paul, which concludes the short reading that was proclaimed a few moments ago, resounds even more powerfully in the context of the Pauline Year. Dear brothers and sisters, let us accept the Apostle’s invitation; let us open our spirit to Christ, who has died and is risen in order to renew us, in order to remove from our hearts the poison of sin and death, and to pour in the life-blood of the Holy Spirit: divine and eternal life. In the Easter Sequence, in what seems almost like a response to the Apostle’s words, we sang: “Scimus Christum surrexisse a mortuis vere” – we know that Christ has truly risen from the dead. Yes, indeed! This is the fundamental core of our profession of faith; this is the cry of victory that unites us all today. And if Jesus is risen, and is therefore alive, who will ever be able to separate us from him? Who will ever be able to deprive us of the love of him who has conquered hatred and overcome death?
The Easter proclamation spreads throughout the world with the joyful song of the Alleluia. Let us sing it with our lips, and let us sing it above all with our hearts and our lives, with a manner of life that is “unleavened”, that is to say, simple, humble, and fruitful in good works. “Surrexit Christus spes mea: praecedet vos in Galileam” – Christ my hope is risen, and he goes before you into Galilee. The Risen One goes before us and he accompanies us along the paths of the world. He is our hope, He is the true peace of the world. Amen!
 HOMILY OF HIS HOLINESS POPE BENEDICT XVI, Saint Peter's Square, Easter Sunday, 12 April 2009