How were the Apostles changed by the Holy Spirit?

The Apostles were profoundly changed by the Holy Spirit, which empowered them to become fearless in their evangelizing efforts. After the Holy Spirit descended upon them, particularly during Pentecost, the Apostles gained boldness and confidence to proclaim the message of Jesus, regardless of the dangers they faced. Prior to this event, they had shown signs of fear and doubt, evidenced by their retreat after Jesus' crucifixion. However, the empowerment they received transformed them into passionate and courageous leaders of the early Christian movement.

This newfound fearlessness allowed them to spread the teachings of Jesus effectively, often in hostile environments, which led to the rapid growth of the Christian church. Their ability to perform miracles and speak boldly about their faith was a direct result of this transformative experience with the Holy Spirit, illustrating the profound impact on their mission.