The Gospel passage takes us today to the Upper Room where, after the Last Supper, a sense of loss has saddened the Apostles. This is due to the fact that Jesus' words arouse disturbing questions: He spoke of the world's hatred of him and of his own, he spoke of his mysterious departure; and there were still many other things to be said, but for the time being the Apostles were not able to bear the weight (cf. Jn 16: 12). To console them, he explains the meaning of his departure: he will go, but he will return; meanwhile, he will not abandon them, will not leave them orphans. He will send the Consoler, the Spirit of the Father, and the Spirit will enable them to understand that Christ's work is a work of love: love of the One who gave himself, love of the Father who has given him. (…) The Holy Spirit illuminates the human spirit and, by revealing Christ Crucified and Risen, indicates the way to become more like him, that is, to be "the image and instrument of the love which flows from Christ" (Deus Caritas Est, n. 33). (Benedict XVI, Homily on the Solemnity of Pentecost, 4 June 2006)