Last week we heard that, following the Ascension, the disciples, Mary, and other followers of the Lord retreated to the upper room in prayer. This week we hear that, while praying in that room, the Holy Spirit comes upon them. Jesus’ post-Resurrection promise, recounted in today’s Gospel, is fulfilled: the power of the Holy Spirit comes upon Jesus’ followers. Saint Paul tells us that all of us, in some way, are given gifts of the Holy Spirit, gifts that can be used to spread the Good News. Today is one of the Church’s greatest festivals. Let us carry the refrain of the responsorial psalm with us throughout the coming week: “Lord, send out your Spirit, and renew the face of the earth!” (Psalm 104:30).