.
Mary and Joseph were pious Jews, but that isn't the primary reason they
were chosen to be Jesus' parents.
Jesus was on track to take David's throne (Luke 1:32-33). Men who take
that position from God have to satisfy two mandatory requirements: they
have to be biologically related to David, and legally related to David's son
Solomon. (2Sam 7:8-17, 1Kings 1:13, 1Chron 22:9-10, and Ps 89:3-4)
In a nutshell: Mary provided Jesus' biological relationship with David, while
Joseph provided his legal relationship with Solomon.
Joseph was a very key element in Jesus' status because David's throne
doesn't pass down to his royal heirs thru women.
_
Amen David’s line is one of the foundations of Gods kingdom which came forth with Christ the seed of
Promise to Abraham and also David later
“The book of the generation of
Jesus Christ, the son of David, the son of Abraham.”
Matthew 1:1 KJV
“And the angel of the Lord called unto Abraham out of heaven
the second time, And said,
By myself have I sworn, saith the Lord, for because thou hast done this thing, and hast not withheld thy son, thine only son:
That in blessing I will bless thee, and in multiplying
I will multiply thy seed as the stars of the heaven, and as the sand which is upon the sea shore; and
thy seed shall possess the gate of his enemies;
And
in thy seed shall all the nations of the earth be blessed; because thou hast obeyed my voice.”
Genesis 22:15-18
And David
“Now therefore so shalt thou
say unto my servant David, Thus saith the Lord of hosts, I took thee from the sheepcote, from following the sheep, to be ruler over my people, over Israel:
Moreover
I will appoint a place for my people Israel, and will plant them, that they may dwell in a place of their own, and move no more; neither shall the children of wickedness afflict them any more, as beforetime,
And as since the time that I commanded judges to be over my people Israel, and have caused thee to rest from all thine enemies.
Also the Lord telleth thee that he will make thee an house. And when thy days be fulfilled, and thou shalt sleep with thy fathers, I will set up thy seed after thee, which shall proceed out of thy bowels, and I will establish his kingdom. He shall build an house for my name, and I will stablish the throne of his kingdom for ever.
And thine house and
thy kingdom shall be established for ever before thee: thy throne shall be established for ever.”
2 Samuel 7:8, 10-13, 16 KJV
the new testament is the promises of the Old Testament coming to pass. Those seem to be of Isaac and Solomon but the New Testament teaches us the truth that they are promises of Christ
abrahams seed which Paul explains well and how his promise applies to us of all nations
“Know ye therefore that they which are of faith, the same are the children of Abraham. And the scripture, foreseeing that God would justify the heathen through faith,
preached before the gospel unto Abraham, saying, In thee shall all nations be blessed. So then they which be of faith are
blessed with faithful Abraham.”
Galatians 3:7-9 KJV
“Now to Abraham and his seed were the promises made. He saith not, And to seeds, as of many; but as of one,
And to thy seed, which is Christ.”
Galatians 3:16
“And
if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise.”
Galatians 3:29 KJV
and David’s seed which produce the heavenly kingdom doctrine which brought the Holy Ghost to us which Peter explained well
“Men and brethren, let me freely speak unto you of the patriarch
David, that he is both dead and buried, and his sepulchre is with us unto this day.
Therefore being a prophet, and knowing that God had sworn with an oath to him, that of the fruit of his loins, according to the flesh, he would raise up Christ to sit on his throne;
He seeing this before spake of the resurrection of Christ, that his soul was not left in hell, neither his flesh did see corruption.
This Jesus hath God raised up, whereof we all are witnesses. Therefore being by the right hand of God exalted, and having received of the Father the promise of the Holy Ghost, he hath shed forth this, which ye now see and hear.”
Acts 2:29-33 KJV
It all Leads to Christ he is always the seed of promise even the first promised seed
“And I will put enmity between thee and the woman, and
between thy seed and her seed; it shall bruise thy head, and thou shalt bruise his heel.”
Genesis 3:15 KJV
Jesus became the “son of man” to fulfill that being born of a woman. And overcome Satan for mankind but he himself was stricken by suffering and death also. All the promises of the son to Be born are fulfilled by Christs birth he would overcome Satan by becoming a son of man
“Forasmuch then as
the children are partakers of flesh and blood, he also himself likewise took part of the same;
that
through death he might destroy him that had the power of death, that is, the devil;
And
deliver them who through fear of death were all their lifetime subject to bondage.”
Hebrews 2:14-15 KJV
the serpent brought mankind death in those moments in Eden but Jesus came forth and crushed his head though he suffered and died he overcame in death and rose up to life offering man life tether then death