Final answer:
On Pentecost, the twelve apostles received the Holy Spirit and were inspired to preach about Jesus in different languages.
Step-by-step explanation:
On Pentecost, the twelve apostles experienced the descent of the Holy Spirit as described in Acts 2. The Holy Spirit appeared to them in the form of tongues of fire. The apostles were inspired by the Holy Spirit to preach about the crucified and risen Christ in different languages, so that everyone could understand.