We begin with what we know as believers in Christ, things we know because the Bible and especially the gospel say they are true (e.g. Christ died, then was raised to life so that death no more had dominion over Him), and things we have come to know by experience through faith in Christ (we too have been raised from the dead to live a new life). But then we must stop and think: this is true of me! I am “in Christ” and this is who I am in Christ! This is a critical step in the “renewing of the mind.” We need to think sound doctrinally, but our doctrine is not merely intellectual. Eternal life is a real life, a new life. We have been born again. We are new creations.
And now we have come to “yield.” In light of who we are, we are now commanded to present our bodies, and yes, even the various parts of our bodies, to Christ. In one sense, this is the repetitive act of “faith in Christ” that characterized our faith when we first trusted the Christ of the gospel. We walk by faith (2 Cor. 5:7). As you therefore have received Christ Jesus the Lord, so walk in Him (Col. 2:6). The principle of living the Christian life is no different than the principle of beginning the Christian life. This only I want to learn from you: Did you receive the Spirit by the works of the law, or by the hearing of faith? Are you so foolish? Having begun in the Spirit, are you now being made perfect by the flesh? (Gal. 3:2-3).
We see this in Rom. 6, that the command to present ourselves (6:12-14) is preceded by the “baptism,” our union with Christ in His death, burial and resurrection (6:1-10; cf. Col. 2:12. We are by NATURE a new creation. It is real. We are citizens in a new kingdom (Col. 2:12), one where grace reigns “through righteousness.” Regardless of how sinful the natural world is around us, we do not live in nor are we ruled by that kingdom. So it no longer makes sense for us to present our bodies as instruments of unrighteousness to sin. It only makes sense that we would present our bodies as instruments of righteousness to God. That is why Paul is incredulous at the thought that we should knowingly continue in sin (6:1). It is also why he says in 12:1 that presenting your bodies to Christ as living sacrifices is “your reasonable service.” “Service” here is not the bond-slave but religious service. Heb. 9:1 speaks of the Old Covenant and the Levitical system as, ordinances of divine service and the earthly sanctuary. That is the same word. In Christ, under the new covenant, we do not have the kinds of service practiced in the OT. Rather, we present our bodies to Christ and what He produces is the new service.
OBEY. And note that 6:12-14 on “yielding ourselves to God” leads to righteousness. Here is one thing to note: in the rest of the chapter there are no commands to “be righteous” or “obey” or “don’t sin.” The decision was made when you presented yourself to God. You are the slave of the one to whom you present yourself (v16). Having been set free from sin, you became slaves of righteousness (v18). That constant faith, “presenting” yourself to God, will produce in your life fruit to holiness, and the end, everlasting life (v22).