Stephen, filled with the Holy Spirit, was appointed as one of the first deacons and became a key figure in the early Church, delivering a powerful defense that recounted Israel's history and God's promises. Despite facing opposition and false accusations from Jewish leaders, he preached passionately about Jesus, ultimately leading to his martyrdom by stoning. His unwavering faith and final words, asking for forgiveness for his persecutors, marked him as the first Christian martyr.