I'd say there's more a jumping from two different sides in "keeping the 10 Commandments" (the subject of this thread ... right?). One side seems to be saying No, it's not necessary to be saved. The other side seems to be saying yes, it's gotta be done to be saved.
The essential issue seems to me that keeping the 10 Commandments can't be performed by sinful human beings to any range of perfection or warranting of God's reward. "
For by works of the law no human being will be justified in his sight, since through the law comes knowledge of sin." The Law wasn't really intended to justify human beings through this work, then. Obviously God knew this before He gave Israel the Law. The Law wasn't meant to justify people in general before God.
The Law does point out, though, that
if we could obligate God to save us, we're obligated to be perfect. Yet we're not perfect. We're actually sinful.
Jesus Christ is our perfect representative and He has born the penalty of our sinfulness.
Believers freed from the commanding and condemning power of the covenant of works.
But that doesn't deprive the Law of its actual intent: "
Do we then overthrow the law by this faith? By no means! On the contrary, we uphold the law."
So it doesn't change the actual obligation to the Law, which remains (and remains to be discussed). We continue in gratitude to seek out correction of our sinfulness, knowing full well that our sinfulness continues on and is the reason for Christ's bruising, stripes, and death on the Cross.
Keeping the 10 Commandments is not the same as performing them according to highly exacting Pharisaical principles. And they were indeed exacting, far more so than we give Pharisees credit for. Something must exceed it, though. Or we're dead. "
unless your righteousness exceeds that of the scribes and Pharisees, you will never enter the kingdom of heaven."
Jesus exceeded it.
But keeping the Law means something else. It was meant to accomplish some things. We find the purpose of the Law written in the hearts of believers. "
you show that you are a letter from Christ delivered by us, written not with ink but with the Spirit of the living God, not on tablets of stone but on tablets of human hearts." Believers are following the Spirit Who wrote the Law, and thus fulfilling the Law's point and purpose. "
But the fruit of the Spirit is love, joy, peace, patience, kindness, goodness, faithfulness, gentleness, self-control; against such things there is no law. And those who belong to Christ Jesus have crucified the flesh with its passions and desires." "
Owe no one anything, except to love each other, for the one who loves another has fulfilled the law."
Finally, when we find ourselves keeping Christ's commandments, we learn something about
ourselves. "
And by this we know that we have come to know him, if we keep his commandments." It's not particularly a question whether Jesus' commands line up with the 10 Commandments (though I think they do). When we follow His commands, we learn something from this observation We've come to know Him.
The law of the ten commandments a rule of life to believers.