Rom. 8:1-17 | Forever Changed: Romans sermon series, Part 14. In Romans 8, the Apostle Paul writes that a person is either "in the flesh" or "in the Spirit." What does this mean? We learn that the unsaved unbeliever is "in the flesh," while the Christian is "in the Spirit." The Spirit and the flesh are not "in" the Christian. This is a crucial distinction with many implications for life.