My take on it is that it's not the trying to stop sinning that is the hardest, it is the stopping that is hard. Pauls compassion and humanity shine through in Romans chapter 7 when he talks about his own problems of sinning, his battles between good and evil, and of course the salvation, deliverance from sin that came from and comes through Christ Jesus.
Clearly if one of the original Apostles of our Lord had difficulty with sinning, certainly I will have problems as well. And I do. There may be Christians who do not sin. But I have never met one. Despite our best efforts here on earth, the battle between good and evil will continue until it is settled by Christ once and for all.
Thanks for your insights, Sacerdote.
Moriah's grasp on this bes as follows: that many both wear themselves down in futility and teach others to do likewise by ascribing the "battle" of the Christian life to being the battle against sin in their flesh. And they believe beating themselves up mentally (which translates always externally to beating others up emotionally), gritting their teeth, screwing up their "willpower", trying to force themselves to swallow daily doses of bitter "medicine" in the form of self-berating, self-condemnatory concepts and thoughts (which again, they project out and spew onto others out of their own internal misery), etc. etc. will EVENTUALLY get them to the place where they will be 24/7 "obedient" without fail.
Trouble being -- it will never happen. Trying to follow the law leads to more sin and more futility. If trying to follow the law a.k.a. "be obedient to God" worked, no one would have needed a Saviour.
And the fact of the matter bes, they bes trying to fight the battle HE already won. HE already did all that. HE already "condemned (literally, passed sentence of doom upon) sin in the flesh." The notion that sanctification consists of a progressive human effort toward improving the flesh, cleaning it up, behavioral modification, etc. bes all entirely A LIE FROM HELL. TRUST Moriah it KNOWS, It knows the architecture of strongholds and how they bes built and of what materials.
Anyway. No, that bes NOT the "battle" ppls bes meant to fight. JC already fought that one and won, no need to reproduce stupidly and ineffectually and in futility what He did in perfection. The battle instead bes simply to WALK IN THE SPIRIT because when one does, they automatically will not fulfill the lusts of the flesh, period. It bes a given.
And apparently, in modern Christendom, a well kept secret.
Ppls likes their pride and clings to lies that they can fix themselves "with God's help". Bootstrap rugged individualism of the Western hemisphere but found nowhere in the Word which paints a very different picture of man's plight and how to get out of it.