to which I was appointed a preacher and an apostle (I am telling the truth in Christ, not lying), a teacher of the Gentiles in faith and truth.

 (ii) He is a witness to the story of Christ. A witness is a man who says: "This is true, and I know it" and says also "It works." He is a man who tells, not only the story of Christ, but also the story of what Christ has done for him. 