Obedience Is Relational
This may seem obvious, but obedience requires two parties: the one obeying, and the one obeyed. The Christian obeys God. Christian obedience is not some sort of purity detached from relationship to God. We do not pursue a self-contained morality, as if virtue in itself meant something. "Getting better" at obedience (a.k.a. sanctification) is becoming submissive to God. Either we are righteous for God's sake, or righteous for the sake of self (self-righteous, which is to say unrighteous).