1. He appeared to Peter and the Twelve (5-6)
Biblical faith is not a vague feeling or a philosophy or theory. Faith rests on concrete historical evidence, on the testimony of reliable witnesses. The risen Jesus appeared to Peter and restored his failure. He appeared to the Twelve when they were trembling in fear behind locked doors. He spent 40 days between his resurrection and ascension visiting believers to plant in them resurrection faith. James, the Lord's brother, and all the apostles were witnesses to the fact that Jesus rose from the dead.
2. He appeared to me also (7-11)
Paul himself met the risen Jesus on the Damascus road and his life was transformed. He had been God's enemy, but by God's grace, the risen Jesus met him and changed him into an apostle and missionary to the Gentile world. Changed lives are the best testimony to the fact of Jesus' resurrection.
Application: Lord, continue to work in me by the power that raised Jesus from the dead. Change me in my inner person until I can be your useful servant.
One Word: A witness to the resurrection