You say this as if Torah Observant believers think obeying God earns us our salvation. NEWS FLASH, WE DO NOT THINK THAT!!
Does salvation require a change in our behavior? YES OF COURSE! It is the realization of our sinful behaviour that shows we need salvation. Should we receive salvation and continue to live as we did prior to salvation? GOD FORBID! After receiving salvation, our desire is to live as Yeshua did, to live a life of obedience to God's laws.
You claim you don't think that, but your belief that a person must observe the Torah in order to maintain his/her salvation says otherwise. If faith in the finished work of Jesus saves you, it is also faith that mainains you.
So you are saying then salvation requires no change in lifestyle? You can live like hell after salvation and still be saved. I think you better reread Matthew 7 cus Yeshua had something very different to say than what you are.
Sin is transgression of the law.
No, that is not what I am saying. Salvation always produces a change in the person receiving salvation because God's nature indwells them through the New birth. That change is called the fruit of the Spirit; love, joy, peace, patience, gentleness, faithfulness and self control. No where in there is circumcision, dietary restriction, nor holy day observance mentioned or equated. I can exhibit all those fruit and still work on the Sabbath. I can exhibit all those fruit and not be circumcised. I can exhibit all those fruit and still eat pork.
You keep using extreme potential cases, like "living like hell" to prove your point, when I've never claimed that a saved person lives like that. I don't live like that. Jesus saved me from a life of debauchery over 24 years ago. I am not the same person I was then, for I have grown in the fruit of the Spirit, all the while eating pork and not observing Mosaic holy days. I was circumcised at birth, not even on the eighth day, apart from any say I had in it.
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That verse you keep quoting in 1 John 3:4
Do you know that that word "anomos" is never used to speak of the Law of Moses? It speaks of another Law. The same law written on the hearts of gentiles that Paul speaks of in Romans 2. It's not speaking of the Law of Moses, but God's moral law that is universal to all people, not just those who were given a covenant on Mount Sinai.