What does it mean for me to be united in Christ?

Every born-again believer who is saved by grace through faith in Jesus Christ is incorporated into the body of Christ, the church. So, all Christians are united in Christ by definition because they are all united with Christ through salvation. We are called to live out this unity by loving, serving, respecting, and forgiving one another. We are to view and treat other born-again believers in a manner that reflects the actual oneness our Savior has achieved for us. We share the same heart and mind as we serve the same Lord by striving together for the same gospel. So being united in Christ means continually striving to live with other believers in a way that reflects the fact that Christ has made us all one in Him.