In this verse, the apostles are reminded of their divine mission to spread the message of Jesus Christ. They are tasked with preaching and testifying about Jesus, who is appointed by God as the judge of all humanity. This role of Jesus as judge signifies His authority and the fulfillment of God's plan for salvation. The apostles are not just sharing stories; they are witnesses to the truth of Jesus' life, death, and resurrection. Their testimony is crucial for spreading the Christian faith and ensuring that all people have the opportunity to hear about Jesus' saving grace.
The mention of Jesus as the judge of both the living and the dead highlights the comprehensive nature of His authority. It reassures believers that Jesus' judgment is just and encompasses all, regardless of their status in life or death. This universal aspect of Jesus' role encourages Christians to live in accordance with His teachings, knowing that they are accountable to Him. The verse calls for an active faith, one that involves sharing the transformative message of Jesus with others, reflecting the early church's commitment to evangelism and the spread of the gospel.