I do not frustrate the grace of God: for if righteousness come by the law, then Christ is dead in vain.
I find this an interesting verse to mull over. Sometimes it seems our reaction to sin and bad habits is to try and conquer them purely through our own efforts or mortal means. But this isn’t possible. What is true of addictions is really true of all our sins: we, as natural men (and women) cannot overcome them by our own efforts (indeed, in this light addictions are simply the adversary getting smarter about how he preys upon our fallen natures), no matter how hard we try.
But Christ did not die in vain. Freedom from sin, from addiction, from bad habit is possible, but only through his power. Through him, we can be cleansed from all wickedness and have the power to put off our fallen natures to which we are otherwise prone:
Now I say unto you that ye must repent, and be born again; for the Spirit saith if ye are not born again ye cannot inherit the kingdom of heaven; therefore come and be baptized unto repentance, that ye may be washed from your sins, that ye may have faith on the Lamb of God, who taketh away the sins of the world, who is mighty to save and to cleanse from all unrighteousness.
For the natural man is an enemy to God, and has been from the fall of Adam, and will be, forever and ever, unless he yields to the enticings of the Holy Spirit, and putteth off the natural man and becometh a saint through the atonement of Christ the Lord, and becometh as a child, submissive, meek, humble, patient, full of love, willing to submit to all things which the Lord seeth fit to inflict upon him, even as a child doth submit to his father.