What does the Bible say about being witnesses for Christ?

In Acts 10:39-48, we see that being a witness for Christ is central to the apostles' mission. They declare their eyewitness testimonies to the life and works of Jesus, emphasizing that He is the fulfillment of Old Testament prophecies. Peter reminded the early church that they were not just passive observers but chosen witnesses who had seen and experienced Christ's ministry, His atoning death, and His glorious resurrection. This concept is echoed throughout the book of Acts, highlighting that all believers are called to bear witness to the truth of the gospel, sharing what they have seen and heard about Jesus.