Charles H. Spurgeon wrote, "As a believer, you are one with Jesus. Therefore you are secure. You will be confirmed to the end until the day of his appearing." In these words, Spurgeon spoke of every believer as one with Christ. We are one with our Lord Jesus Christ.
Believers are one in Christ through new birth. Every true believer is born of the Spirit. We have been born again unto faith in our Lord Jesus Christ. As we are in Adam through our first birth, so we are in Christ through our new birth. "Therefore, if anyone is in Christ, he is a new creation"(2 Corinthians 5:17).
Believers are one in Christ through the Holy Spirit. We are baptized with the Holy Spirit into the body of Christ (1 Corinthians 12:13). Christ is the head, and we are the body. As Adam was the head of the human race, so Christ is the head of the church, which is his body (Colossians 1:18).
As the human race is one with Adam through sin and death, so we as believers are one in Christ through salvation from sin and death (Romans 5:19; 1 Corinthians 15:22). As we were born with a sin nature in Adam, so we are born again as a new creation in Christ.
Believers are one in Christ through the gospel. We are one with Christ through his death and resurrection (Romans 6:5-6). We have died to the old life, buried with Christ, we are risen with him in newness of life. Water baptism is the symbol of our death, burial and resurrection with Christ (Romans 6:3-4). Therefore, Charles H. Spurgeon said, "As a believer, you are one with Jesus."