if all of the mixed multitude came into the law covenant, then the 12 tribes of the ISRAEL of GOD in Rev.7 , that are in the NEW COVENANT could be of all nations too?
Greetings dear Prologos and peace to you! This is not accurate. Israel is represented in verses 4-8. The nations are represented in verse 9. However, these are ONE flock, ONE shepherd (Israel is the "little" flock, not just the Jews - and the nations are the "other sheep" - John 10:1-17). The "great crowd" from EVERY nation, tribe, tongue, and people are included WITH Israel in the kingship and royal priesthood. That kingship/priesthood includes people from EVERY nation, tribe, and tongue... INCLUDING Israel. (Revelation 5:9, 10) That's why they, too, are standing BEFORE the throne... and "rendering SACRED service IN GOD'S TEMPLE." Only priests can render sacred service, dear one. (Revelation 7:9-17)
The reason Israel is numbered is so that God's promise to Abraham can not be thwarted. Israel was supposed to be a royal nation, "a people for a special possession." NOT because they were special in and of themselves, but because of the promise made to Abraham. Because of his brothers' treatment of Joseph, Joseph was sent ahead into Egypt where Israel ended up (due to the famine that occurred while Joseph was second in command). They stayed there and for about 400 years enjoyed peace with the Egyptians. And then a new Pharaoh took office. By that time, Israel had greatly multiplied... and Pharaoh was convinced they were to be feared. So, he began to severely oppress them, which caused them to cry out.
And so God delivered them from Egypt. But no more than 3 days out they began to complain about BEING delivered... as well as oppress one another. And this tendency of Israel... to carryon with outcry when their enemies oppressed them... beg God to intervene... have Him intervene... only to have them turn around and oppress their fellow man... continued for millenia. Until, while being oppressed by Rome (and not even as bad as many of their previous oppressors)... called for the death of the One sent to release them from ALL oppression... once and for all, and forever: the Son of God.
With that event, God turned His attention to the nations... to take out of THEM "a people for His name"... to replace Israel as His "chosen race and people for special possession." Thus, a kingdom that WOULD have solely gone to Israel was now offered to the nations. BUT... God made a vow to Abraham that He would not break. And so, 144,000 "slots" were reserved for 12,000 from each tribe (except Dan) "from among the sons of Israel", Abraham's grandson by Isaac ("Israel" was the name given to Jacob, Isaac's youngest son). To ensure this number, those who belong to it... who are literally from among the sons of Israel ("Judah", made up of the 2-tribe kingdom of Judah/Benjamin, and "Israel", made up of other 10 tribes)... such ones are SEALED. They are the only ones who receive a sealing... because they ensure that the promise (to Abraham, that by means of HIS seed, Isaac, the nations would bless themselves... and these are Isaac's seed... through his son, Jacob aka Israel)... IS fulfilled.
The others, of the nations... although also "anointed" (and thus chosen to be kings and priests)... are NOT "sealed." Because they are not part of the promise to Abraham - there is no need to "seal" them because there was no promise made as TO them, not as made to Abraham. This does not make those "from among the sons of Israel" any BETTER, however, than those of the nations. The only difference between the two is that one group is solely from among the sons of Israel... and sealed to ensure the promise to Abraham is fulfilled... and the others are out of EVERY nation (INCLUDING Israel, but in addition to those who are sealed), tribe (including the tribes of Israel), tongue... and people.
These make up ONE flock... and in the KINGDOM... there is no difference ("there is neither Jew nor Greek"). Nor is there any now. One is not greater or lesser than the other. They are only different in that some make up the group to ensure the promise to Abraham is fulfilled.
Those of the nations are chosen because they SHOW themselves to "be Israel"... NOT on the outside, but on the INSIDE: based on having the NEW Law written on their hearts. (Jeremiah 31:31-34) They may or may not be Israel BY BLOOD. Regardless, these are those who SOFTEN their hearts so that God can write His law there. They are not numbered (and no man can number them)... because the number's fulfillment is based on time: however many get IN the "Ark" (of the [NEW] Covenant)... before God closes the Door. That Door... is Christ (John 10:9).
For now, that Door still stands open. Indeed, he... the Spirit (2 Corinthians 3:16)... and his Bride... KEEP saying, even until now:
"Come! Take 'life's water'... the holy spirit of God, which that One pours out from his innermost parts... upon any who are wishing and thirsting... FREE!"
Again, peace to you!
A slave of Christ,