Yes, it is not necessary about physical activity but more important is to introduce new mental habits because a person can do good deeds with an ill intention in his mind...we can agree on this part but most of what you wrote somehow contradict even your own doctrine. According to the bible, faith does not spontaneously leads to holiness, it requires mutual support by conscious effort in holding up moral values.
Reanalysing Hebrews 12
It
says 14 Make every effort to live in peace with everyone and to be holy; without holiness no one will see the Lord.
It
does not say "make every effort to rest in God so that holiness will manifest naturally"
Your previous post say we need grace to live right but now you say we don't need God's intervention about it.
I just red Galatians 3:24 and it say the law is a Guardian pulak...
But in practical sense i agree with you we don't necessary need the HS or law because our nature is capable of loving. The only thing that is distorting it is our self-delusion aka ego/conceit and there are many sensible ways of purifying the mental state without having to invoke a personal God.
I'm not sure if there is any verse that specifically stated that credited righteousness refers to a special position/status.
Even if so, it is still mutually related to one's mental state since you claim that one's character will be altered to match it. However, this argument also exposed its downside. There are also verses that indicates
the failure of the mind to keep up with God's extra will can somehow jeopardize those position/status. For example, Cain did believed and worship God but his was rejected on the basis of failing to please God. This again shows that faith alone does not naturally or necessary leads to other fulfillment.
Therefore other instructions are made clear;
1 john 3
10 In this the children of God and the children of the devil are manifest: Whoever does not practice righteousness is not of God, nor is he who does not love his brother. 11 For this is the message that you heard from the beginning, that we should love one another, 12 not as Cain who was of the wicked one and murdered his brother. And why did he murder him? Because his works were evil and his brother’s righteous.
13 Do not marvel, my brethren, if the world hates you. 14 We know that we have passed from death to life, because we love the brethren. He who does not love his brother[c] abides in death. 15 Whoever hates his brother is a murderer, and you know that no murderer has eternal life abiding in him.If go by your premise, Cain shall be equally righteous as Abel since they both believe and worship God therefore God credited righteousness to them??
I don't think there is any reason to say grace is not available before the new covenant because Abraham, Noah, Moses and many other believers did received it...
Why I ask this, is because you don't even believe there is a God. I don't see the reason why you would want to pursue further into the details base on the first premise.