Jesus said Nicodemus: “The wind blows where it chooses” (John 3:8). This would be an excellent description of the coming of the Holy Spirit. On Pentecost Sunday he came as a powerful wind, the noise of which filled the whole house and settled as togues of fire on the apostles. Luke uses dramatic imagery to describe his descent, probably to highlight the importance of the occasion and the change that took place in the group of frightened men. The Holy Spirit came so that the apostles might bring to fruition the sacrifice of Jesus on the Cross and enable his Church to be born.
Throughout Acts, it is the Spirit who guides Peter to accept the gentile centurion Cornelius as worthy of baptism (Acts 10:44-48), leads Philip to instruct and baptise the Ethiopian eunuch (Acts 8:26-40) and who inspires Stephen to preach about Jesus and to die for him (Acts 7). The same Spirit directs Paul in his many journeys, which eventually end in Rome. Though Luke's account of Pentecost is a drama, generally the coming of the Spirit is gentle.
Thou of all consolers best,
thou, the soul’s delightful guest
dost refreshing peace bestow.
— Sequence for Pentecost Sunday