I really appreciate all the perspectives brought to this topic.
Again, I had not noticed how the first part of Abrahams believing God and having it accredited for righteousness did not really involve obedience (Gen 15),
It did involve obedience. God told Abraham where to go, and he went.
Hebrews 11:8 By faith Abraham, when called to go to a place he would later receive as his inheritance,
obeyed and went, even though he did not know where he was going.
Genesis 12:4 So Abram went, as the LORD had told him; and Lot went with him. Abram was seventy-five years old when he set out from Harran.
but when that believing God and having it accredited for righteousness was FILLED TO THE FULL it involved a huge test of obedience.
Believing alone is nothing, it is dead. Believing must be accompanied with right action.
James 2:22 You see that his faith and his actions were working together, and his faith was made complete by what he did.
Faith alone is dead. See James 2:14, 17, and 20.
I am sure there is a pattern here for the Christian walk. As our faith grows over time God may test it with greater demands on our obedience.
Right, but a person will not be saved in the first place until they believe and obey God. See Acts 5:32, and John 14:23, and many more.
And I agree with you that circumcision was not for Gentile Christians. And Gentile Christians had no need of ceremonial OT laws relating to the temple and sacrifice, since they lived in Corinth or Rome.
It does not matter about Gentiles. The Truth is for everyone.
Gentiles could have obeyed the old law and would have had a relationship with God.
The people, all people who wanted to be near God's Spirit had to do certain works, certain works just to make themselves clean.
The works were ceremonial works. A person could not go to the tent, and later the temples to worship God, where His Spirit was, not until they made themselves clean.
No one has to clean themselves anymore by doing various external washings, and the sacrifice of animals. They no longer have to make themselves clean by adhering to a dietary law, and getting circumcised, and observing special days... We only are made clean now by faith that Jesus' blood makes us clean, after repenting of our sins.
We have to obey to get saved, and to stay saved.