Jesus was the first born, the only begotten son of the most high GOD by the power of the FATHERS spirit overshadowing Mary. This event while different than the normal physical act of procreation was testified to by the symbolism of all those patriarchs that came before.
In Hebrews chapter 11, the faith chapter, it lists some by name and others by a group but all having the faith of the truth of GOD. These ancient saints understood what the saints understand today. They were Christians having the Holy Spirit.
It is interesting that none of these ancient Christians were in their line of descent the first born. Able was the second son of Adam, Abraham was the third son of Nahor, Jacob was the youngest, Joseph was the next younger to Benjamin, David was the youngest son of Jesse, Solomon was not the eldest son of David. Now Rehoboam was the eldest son of Solomon but the kingdom of Israel was taken from him and eventually Judah was lost as well thus indicating that no first born of men was fit in GODS eyes. So then all of once was Israel was now gone and even afterwards the first born of the kings never happened because the line was broken , Judah went into captivity and the breach never healed.
Jesus became in prophecy the future heir to the throne of Israel and of creation. Jesus was of the kingly tribe, Judah , but not of the priestly tribe of Levi. Jesus was a priest according to the order of Melchizedek, a priest who lived in Abrahams day, long before Israel or Judah existed. Melchizedek was both a king and a priest of the most high GOD. Melchizedeks priesthood did not observe circumcision or the law of Moses. Does all this sound familiar to any of you readers? Melchizedek had the Holy Spirit and blessed Abraham for defeating the kings under Chedorloamer .
It is a fact the scriptures reveal that grace, the new covenant, existed long before the law was given to Moses. It is therefore a fact that all these ancient people that had the Holy Spirit were Christians as they all believed in a future messiah and understood the message of the gospel. They will be the ancient elect of GOD included in the total number of the elect, 144000. They will be in the first resurrection with the saints during and after Christ. None of them were the first born but believed in the one who was the firstborn. If you understand the symbolism of the carnal feast days of ancient Israel concerning the day of Pentecost you will see how these ancient saints are included in the elect 144000.
Leviticus 23:17 instructed the carnal Israelites to bake two loaves of bread baked with leaven. These two loaves symbolized the ancient saints and the modern, that is those before and after Christ. They are called, “The first fruits of GOD”. Revelation 14:4 Leviticus 23:17 These two loaves together are the complete church, one of the measures of meal that Jesus mentioned in a parable about the kingdom of GOD.
Matthew 13:33 “The kingdom of heaven is like leaven, which a woman took and hid in three measures of meal until it was all leavened.”
Each measure of meal produced a leavened loaf of bread. One loaf represented the church composed of both ancient and modern elect saints to total in the end time to 144000. The next loaf would be the people of the millennium and the third the people of the second resurrection. These are the three measures of meal. The leaven in all three symbolizes being leavened with the Holy Spirit.
All of these elect saints were and are in Jesus Christ, the first born of them all spiritually speaking. In the days of the ancient saints baptism was not practiced due to Christ not yet being the messiah but they practiced circumcision symbolizing that through human reproduction a woman would be born whose son would be the son of GOD. Isaiah 7:14 This practice of circumcision ended with Christ and was replaced with baptism and in order to have baptism apply to those ancient saints Jesus was baptized for them. Romans 15:8 Matthew 3:15 righteousness is imputed to all the saints because of our faith and these ancient saints certainly had faith therefore in order to fulfill the righteousness imputed to these ancient saints Jesus, the one they all had faith in, was baptized to confirm the promises made to the patriarchs. The true first born son of the most high GOD was the only one who could do this.