There is a lot of good in this but I think in the end it doesn’t encompass the mercy of God or his very real help or the real essence of Romans 7. 1/6 https://www.desiringgod.org/interviews/is-my-repentance-real-if-i-keep-committing-the-same-sin

Piper says that if you confess a sin but know in a fatalistic way that you will probably commit it again, you are being dishonest and that your soul is in danger. Paul in Romans 7, I think, describes his present condition knowing that he will continue to sin 2/6

...that while he loves God’s law he has another law at work in his members. He may well have in mind a recurrent sin. We don’t know. But the description he provides seems to encompass sin in its totality. He is not making peace with it. He hates it. 3/6

But nor does he seem to be telling God, I’ll not do this thing ever again (usually a bad idea, I think, to make vows about how good you will be in the future). The resolution in Romans 7 is not to commit to being better...4/6

but rather, “who will save me from this body of death, thanks be to God through Jesus Christ my Lord...” Paul cries out to God precisely because he does not have the power in himself to rescue himself. He must have Christ. 5/6

And he trusts that despite his weakness Jesus will forgive and help him. I think that is the way we deal with besetting sin. Fruit checking, in the end, which is what Piper suggests I think, always leads to despair. 6/6