Okay, this is a lot of back and forth, and I seem to get the gist between you
@GWH and
@Soyeong and I think I see the fundamental misunderstanding. So let me start off by saying, what Soyeong says is correct (although I disagree with some minute details, but the gist is correct). So let me explain and I'll do my best to be thorough and maybe I can resolve this misunderstanding.
Back in the day around the time of Jesus, Jews believed that following all the law is what saved you. Meaning, if you are perfect in the law, that is what mattered.
The Law defined what God considered righteous. It's like a mirror to show us really how dirty we are in comparison to the standard that God set. So to simplify:
Following the Law = Righteousness
Breaking the Law = Sin
When Christ entered the picture, the understanding of salvation went back to Abraham's time, who declared: "He (Abraham)
believed in
Adonai, and he credited it to him as righteousness." Which was always the basis for salvation. Salvation has
always been through belief. When Jesus came, he said he came to save the Jews who walked away from that belief and relied on their own righteousness to follow the Torah/Law. But it's
always been grace. (There's more nuance to this but I'm trying to not make it convoluted.)
Now, let's get more nuanced because I think this is where the fundamental misunderstanding is. When it comes to the law, we are
still expected to follow it. God's grace is never a license to sin, or to disregard God's righteous rules. It's literally impossible to follow them all, but God still expects you to
try. Because either you are a slave to righteousness (the law) or a slave to sin (lawlessness). You cannot serve 2 masters. That does not mean the law gets you to heaven, it just means God's expectations is that
ALL His children are still, to the best of their ability, supposed to follow the law.
You cannot be grafted in as heirs to the promise of Abraham, and create a separate rule set which is founded on Abraham. Being grafted into the tree, means you assimilate into what God started which includes the foundation and that foundation is always obedience as a means of expectation. Again, not that it saves you as grace was always the means, but as the fact that the contract you sign when you say that God is your God, means you will follow His rules, His decrees, His commands. Your life is no longer your own, it is His and He says, follow the rules.
That's where you get the concept of fruit. A bad tree cannot produce good fruit and a good tree cannot produce bad fruit. The more righteousness you're walking in (the law), the more good fruit you produce (faithfulness, kindness, gentleness, self control, etc). Because righteousness fundamentally changes your heart. It's that new change/new person that makes you a new creature and a son/daughter of God.
I hope that clears everything up. If you have questions, feel free to ask.