Romans 7:4

"Therefore" introduces an application of the illustration to the readers. The believer has not died to the Law (i.e., been freed from its binding authority) because the Law died, but because we died with Christ. We have died to the Mosaic Law (Torah), not to the Old Testament; the Old Testament is still authoritative revelation for the Christian. But the relationship that once existed between the Old Testament believer and the Mosaic Law no longer exists for the Christian. The body of Jesus Christ is the literal body that died on the cross. Paul viewed Jesus again as our representative, as in Romans 5:12-21 and chapter 6, rather than as our substitute, as in Romans 3:25. Since we died with Christ we no longer have to live according to the commands of the Mosaic Law.

Every believer not only died with Christ but also arose with Him (Romans 6:14). Thus God has joined us to Christ. The phrase "might be joined to another" does not imply that our union is only a possibility. God did unite us with Christ (Romans 6:5). The result of our union should be fruit-bearing (cf. John 15:1-6; Galatians 5:22-23).