From The Liturgical Year by Abbot Prosper Gueranger
Let us look at the apostolic college. The frequent instructions they have been receiving from their Lord, during the forty days after His Resurrection, have changed them into quite other men; but now that they have received the Holy Ghost, the change and conversion is complete. They are filled with the enthusiasm of faith; their souls are on fire with divine love; the conquest of the whole world, this is their ambition, and they know it is their mission. What their Master had told them is fulfilled: they are endued with power from on high, and are ready for the battle. Who would suppose that these are the men who crouched with fear, when their Jesus was in the hands of His enemies? Who would take these to be the men that doubted of His Resurrection? All that this beloved Master has taught them is now so clear to them! They see it all, they understand it all. The Holy Ghost has infused into them, and in a sublime degree, the gift of faith; they are impatient to spread this faith throughout the whole earth. Far from fearing, they even long to suffer persecution in the discharge of the office entrusted to them by Jesus, that of preach-ing His name and His glory unto all nations.
Look at Peter. You easily recognize him by that majestic bearing, which, though sweetly tempered by deep humility, bespeaks his pre-eminent dignity. A few hours ago, it was the tranquil gravity of the head of the apostolic college; now, his whole face gleams with the flash of enthusiasm, for the Holy Ghost is now sovereign possessor of this vicar of Christ, this prince of the word, this master-teacher of truth. Near him are seated the other apostles: Andrew, his elder brother, who now conceives that ardent passion for the cross, which is to be his grand characteristic; John, whose meek and gentle eye now glistens with the fire of inspiration, betokening the prophet of Patmos; James, the brother of John, and called, like him, the son of thunder, bears in his whole attitude the appearance of the future chivalrous conqueror of Iberia. The other James, known and loved under the name of the brother of Jesus, feels a fresh and deeper transport of joyousness as the power of the Spirit thrills through his being. Matthew is encircled with a glowing light, which points him out to us as the first writer of the new Testament. Thomas, whose faith was the fruit he took from Jesus' wounds, feels that faith now made perfect; it is generous, free, unreserved, worthy of the brave apostle of the far east. In a word, all twelve are a living hymn to the glory of the almighty Spirit, whose power is thus magnificently evinced even at the outset of His reign.
The disciples, too, are sharers, though in a less degree than the apostles, of the divine gift; they receive the same Spirit, the same sacred fire, for they too, are to go forth, conquer the world, and found Churches. The holy women, also, who form part of the assembly of the cenacle, have received the graces of this wondrous descent of the Holy Ghost. It was love that emboldened them to stand near the cross of Jesus, and be the first to visit His sepulchre on Easter morning; this love is now redoubled. A tongue of fire has stood over each of them, and the time will come when they will speak, with fervid eloquence, of Jesus, to both Jews and Gentiles.