Pentecost
Pentecost is the birth of the Church. Fifty days after Easter, the Holy Spirit descends upon the apostles gathered together, and these fearful men become fearless witnesses of Christ. On that day, the word proclaimed in Jerusalem is understood by men of every nation, and three thousand people receive baptism. What was only a small group becomes a people, sent to the whole world.
The fire of the Spirit
On the morning of Pentecost, a sound like a violent gust of wind fills the house, and tongues of fire rest on each of the apostles: “They were all filled with the Holy Spirit and began to speak in other tongues.” Acts 2:4 Wind and fire are, throughout the Bible, the signs of God’s presence; here, they tell the irruption of the Spirit who takes possession of hearts. These same apostles who had fled at the hour of the Passion, shut in by fear, suddenly come out without fear to proclaim Christ. The transformation is total: it is not their courage that has grown, it is the Spirit who has seized them. Pentecost is the day when the promise of Christ is fulfilled and the Church receives its soul.
The reversal of Babel
At once, a crowd run together from every country hears the apostles proclaim the wonders of God, each in his own language. This marvel is the reversal of Babel: there, long ago, the pride of men had confused the tongues and scattered the peoples; here, the Spirit makes the word understandable and gathers the nations into one same faith. The division caused by sin is conquered, not by a return to a single language, but by a gift by which each, keeping his own, hears the same Good News. The Church is born from the outset universal, called to reunite in unity all the peoples of the earth, without erasing their diversity. This marvel of tongues tells beforehand the catholic vocation of the Church, this word meaning universal: it is made for all peoples, in every language, and its unity crushes no culture but gathers them all into one same faith. On the day of its birth, the Church already speaks the language of every man.
The first proclamation
Then Peter rises and delivers the first Christian sermon. Before the crowd, he announces that Jesus, crucified, has been raised by God, that he is Lord and Messiah, and that the Spirit poured out that day is the sign of the new times. Overwhelmed, the hearers ask what they must do, and Peter traces for them the way of entry into the Church: “Repent, and let each of you be baptized in the name of Jesus Christ for the forgiveness of your sins.” Acts 2:38 Conversion, baptism, forgiveness of sins, gift of the Spirit: the whole Gospel holds in this answer. That day, three thousand people are baptized. From a handful of disciples, the Church passes suddenly to a people. The reversal must be measured: Peter, who had denied his Master out of fear of a servant girl, now stands before the crowd of Jerusalem and openly proclaims the Risen One. His speech follows an order that will remain that of all Christian preaching: to recall what God has done in Jesus, to show that the Scriptures announced it, then to call to conversion. This first sermon sets the model of the proclamation of the Gospel. Peter builds it entirely on the fulfillment of the prophets. What has just happened, he says, is what the prophet Joel had announced: in the last days, God would pour out his Spirit on all flesh, and sons and daughters would prophesy. And the resurrection of Jesus he reads in a psalm of David, where the righteous one affirms that God will not abandon him to the realm of the dead nor let his faithful one see corruption: David died and was buried, but Christ is risen, fulfilling the word at last. Thus, from the very first day, the Church announces Christ by showing that all Scripture led to him.
The gift that remains
Pentecost is not a miracle over once for all. The Spirit received that day remains in the Church and continues to act through the centuries. It is he who, in baptism and confirmation, is given to each believer; he who inspires the Scriptures, guides the councils, raises up the saints; he who makes of the multitude of the baptized one single body. What the apostles received in the Upper Room, the Church transmits ceaselessly, for Pentecost is prolonged in it until the end of time. Each generation of Christians lives by this same fire, received at the source and never extinguished. It is not indifferent that this gift takes place on the day of the Jewish Pentecost. This feast celebrated the harvest, but also the gift of the Law to Moses on Sinai, fifty days after the departure from Egypt. Now what was once given on tablets of stone is now given in hearts under the form of the Spirit: it is the exact fulfillment of the promise of Jeremiah, a new covenant where the law is no longer engraved on stone but written within. Pentecost is thus the Sinai of the new covenant, where God no longer gives only a commandment, but the interior strength to fulfil it.