“The single most important activity of the apostles is surely that. . . of witness to Christ (e.g., John 15:27; Acts 1:8; 13:31). The apostles bear witness, authorized and empowered by Christ himself, to his resurrection as the fulfillment of covenant history.” (Richard B. Gaffin, Jr., Perspectives on Pentecost, p. 91).
“Jesus is claiming to be this unique Lord, the God and Savior of the new Israel, whom he empowers with the Spirit and commissions as his witnesses. Those who worship Jesus as Lord, who pray to him and serve him, bear witness that he, not the idols, is the only God and Savior. The Spirit is sent to empower us to testify to the divine glory that the Son deserves.” (Dennis B. Johnson, The Message of Acts in the History of Redemption, p. 44).
Quotes from the Reflection for Trinity Presbyterian Church of the Orthodox Presbyterian Church.