The principle of a believer's life is Christ-centered, but in the reality of life, there are still many human failures to live in the center of Jesus Christ. This problem occurs because of the many disputes in the context of the life of the believer which causes problems in maintaining unity, the existence of pressure and intimidation against the believer so that it has an impact on living a life centered on Jesus Christ. Through the descriptive analysis method of Paul's Letter to the Philippians, the author conducted an exegetical study of the Bible text of Philippians 1:27-30 which emphasizes the principle of living according to the Gospel of Christ, which provides applications so that believers live in unity, are not afraid of opponents and are ready to suffer. for Christ. So with this research to provide solutions to believers in order to continue to strive for unity and remain strong in suffering.