What is the significance of the Holy Spirit in apostolic preaching?

The Holy Spirit is essential to the ministry and preaching of the apostles, as seen in Acts 2 during Pentecost where the Spirit descends upon the apostles, enabling them to communicate the Gospel with power. This empowerment is fundamental for authentic preaching as it not only equips the apostles to proclaim the truth, but also actively works in the hearts of those who hear. The Holy Spirit is responsible for bringing conviction of sin, as indicated by the response of the listeners who were 'pricked in their heart' (Acts 2:37). This signifies that the Spirit not only assists in the proclamation of the message but also convicts and regenerates individuals, making their response to the Gospel possible.