I apologize if there are many wrongs in writing, cause English is not my mother language.
God is the alpha and omega means every things should come from His order and His wisdom.
So before the foundation of the world He should have a plan first before every things could be come to pass .
Isa43:7 They are my own people, and I created them to bring me glory."
He planned certain names that He wanted to create (His people), these names He wrote in the book of life.
His people would only glorify Him ,if they were resurrected from dead to be alive .
So there should be a premise " Salvation is only by His Grace " this premise is clarified as:
Eph1:4 Even before the world was made, God had already chosen us to be his through our union with Christ, so that we would be holy and without fault before him. Because of his love
Rom8:20 For creation was condemned to lose its purpose, not of its own will, but because God willed it to be so. Yet there was the hope
Gen2:3 He blessed the seventh day and set it apart as a special day, because by that day he had completed his creation and stopped working.
The seventh day or Sabbath day refer : salvation shall come from Him, no one can reach by his/her own effort , every one who try to earn by his/her effort is said as : working on Sabbath day (salvation by work).
Exod31:13 to tell the people of Israel, "Keep the Sabbath, my day of rest, because it is a sign between you and me for all time to come, to show that I, the LORD, have made you my own people.
31:14 You must keep the day of rest, because it is sacred. Whoever does not keep it, but works on that day, is to be put to death.
31:15 You have six days in which to do your work, but the seventh day is a solemn day of rest dedicated to me. Whoever does any work on that day is to be put to death.
From the clues about salvation above, there is a question:
What is Eden story reffer to ?( there is satan in Eden as the cheater, He created only A and E at the beginning not all the names He planned to create , and finally they should be driven out from Eden etc).
With an indirect answer: God looked for a format for His people that He wanted to create them soon by placing name by name in the womb of a woman to be born (names listed in the book of life).
Now all His people who are born from the womb of a woman shall be a spiritually dead being, so ------> they shall be bestowed by His Grace in order to be alive ( only them who are spiritually alive that could Glorify Him/after they understood well :how and what the God's Grace is ).
How can they understand : how and what the God's Grace is
Salvation by Grace shall be taught to His people ----> God should give His words completely ( Gen until Rev ).
In salvation is only by Grace there should be a place for His people to be born in the earth ---> a chosen nation/ chosen people is necessity so there is a event where God should confound their language (Gen11:7) in order they could not communicate each others -----> many nations could be built , then finally God chose Jacob's offspring as the only place He wanted to create His people .
This definitively people only for they know that in salvation by Grace is a necessity, but for long time it would create great human disaster , cause the chosen would act so arrogance to the other people, so God gave the new testament (Yer 31:29-32 ).
God's Grace:
After men were driven out from Eden, no one admitted that they were spiritually dead being (as corpses ) ( although scriptures told clearly : Gen2:17), This was showed when they were given the Torah laws, all of them (chosen people) persistently enthusiastically tried fulfilling those laws , They were driven out from Eden merely to prevent them for not eating the fruit of the tree of life intentionally this meant they surely ate that fruit , if this simplest order they could not fulfill, How could they feel they still could fulfill those hundreds of laws ? funny ?.
Although God already gave them hundreds of years for verification of their spiritually dead (began from the Moses Torah laws until the cross ) no one knew about this.
So the Messiah should come for opening their eyes by force 2.000 years ago.
This is the reason : Why Jesus came to us 2.000 years ago, not in Abraham era , or Moses era .