To me the passage is demonstrating that believers will "certainly not" willfully sin, because they are under grace. The phrase "do you not know to whom you present" does not show suspicion that believers might obey sin, but that "to whom you obey is to whom is your master. Willfully obeying sin is descriptive only of the unregenerate. Our understanding here is clearly different.
To sin or not is a choice.
The choice is to pick up a Bible or pick up a porn magazine.
To present your eyes to look at something lustful or something godly.
To go to a bar or go to Church.
To watch something godly on tv that stimulates righteousness and inspires obedience to the Lord, or to watch something that stimulates sinful desires.
Paul explains that sin in our flesh, in our physical body, will take the lead if we give it an opportunity.
We are not to give it the opportunity, we are not to present ourselves as a slave to obey the sinful desires of our flesh, but rather we are present ourselves as slaves of obedience to our Lord who dwells within us
Shall we chose to sin? Certainly not.
What then? Shall we sin because we are not under law but under grace? Certainly not! Do you not know that to whom you present yourselves slaves to obey, you are that one’s slaves whom you obey, whether of sin leading to death, or of obedience leading to righteousness? Romans 6:15-16
Surely you understand we all have the liberty to make choices each and every day.
We must make the choice to invest our time and energy towards strengthening our spirit, our inner man, in sowing to the desires of the Spirit, rather than sowing to the desires of our flesh.
Do not be deceived, God is not mocked; for whatever a man sows, that he will also reap. For he who sows to his flesh will of the flesh reap corruption, but he who sows to the Spirit will of the Spirit reap everlasting life. Galatians 6:7-8
- he who sows to his flesh will of the flesh reap corruption,
- but he who sows to the Spirit will of the Spirit reap everlasting life.
The choice is to walk according to the flesh or walk according to the Spirit.
There is therefore now no condemnation to those who are
in Christ Jesus, who do not walk according to the flesh, but according to the Spirit. Romans 8:1
This statement is made to those who are in Christ Jesus.
Unregenerate people don’t have this choice as they don’t have the Spirit dwelling within them.
Those who are
in Christ, must make the choice to walk according to the Spirit, rather than walk according to the flesh.
JLB