I appreciate the feedback; and I think that perhaps my comments came off as legalism, that was not my intention. I agree we share many core points. Yes the OT was set up to prove that mankind could never live up to the law; therefore God sent his son as a savior in Jesus Christ. It is only through Jesus Christ that we are saved. No works save us, but it is His grace alone.
Your example of over attachment would be the Pharisees and Sadducees; I think we can link many religious sects today to the same error over overemphasizing scripture and losing the core meaning which is to put God first above all. There core focus was not on God, but of themselves, they used scripture to promote righteousness among themselves. We give up our lives for Him; just like Jesus gave up his life for us.
But you are spot on, the error many make is they develop righteousness and pride (I go to church more, I know more scripture, I serve here etc). We are all horrible retched sinners in need of a savior and that savior was Jesus Christ. However as Romans points out that does not mean we can go on living as we please; this is what I was trying to emphasize. Those of us that know Him have that endless yearning to know more and build that relationship with Him. Getting into his Word, prayer are ways to do that.
But I do think there is a danger in stating as long as you know and acknowledge Jesus you are good (not stating that's what you are implying). The sanctification process corrects us and shapes us in the image of Him; part of that process I do believe means getting into His word and building that relationship. Hope that was clearer (and much more we could get into) but appreciate the polite discourse brother.