Why did the baby Jesus have to be born in the first place?
There is so much focus on His birth, the birth of a cute little baby in a manger, that all too often people forget that His birth was to make possible the most important event in history.
His birth was not that event much to the disappointment of many people. Folks who are truly born again fully understand this, or at least we should.
Following is a collection of scriptures to help us understand why Jesus had to be born along with some thoughts to help frame the context. The scriptures should be enough but I included the commentary to help if needed.
One of the reasons was to fulfill scripture.
And Jesus returned in the power of the Spirit into Galilee: and there went out a fame of him through all the region round about.  And he taught in their synagogues, being glorified of all.  And he came to Nazareth, where he had been brought up: and, as his custom was, he went into the synagogue on the sabbath day, and stood up for to read.  And there was delivered unto him the book of the prophet Esaias. And when he had opened the book, he found the place where it was written,  The Spirit of the Lord is upon me, because he hath anointed me to preach the gospel to the poor; he hath sent me to heal the brokenhearted, to preach deliverance to the captives, and recovering of sight to the blind, to set at liberty them that are bruised,  To preach the acceptable year of the Lord.  And he closed the book, and he gave it again to the minister, and sat down. And the eyes of all them that were in the synagogue were fastened on him.  And he began to say unto them, This day is this scripture fulfilled in your ears. Luke 4:14-21
Here is the full context of Isaiah 53 from which Jesus read from:
Who hath believed our report? and to whom is the arm of the Lord revealed?  For he shall grow up before him as a tender plant, and as a root out of a dry ground: he hath no form nor comeliness; and when we shall see him, there is no beauty that we should desire him.  He is despised and rejected of men; a man of sorrows, and acquainted with grief: and we hid as it were our faces from him; he was despised, and we esteemed him not.  Surely he hath borne our griefs, and carried our sorrows: yet we did esteem him stricken, smitten of God, and afflicted.  But he was wounded for our transgressions, he was bruised for our iniquities: the chastisement of our peace was upon him; and with his stripes we are healed.  All we like sheep have gone astray; we have turned every one to his own way; and the Lord hath laid on him the iniquity of us all.  He was oppressed, and he was afflicted, yet he opened not his mouth: he is brought as a lamb to the slaughter, and as a sheep before her shearers is dumb, so he openeth not his mouth.  He was taken from prison and from judgment: and who shall declare his generation? for he was cut off out of the land of the living: for the transgression of my people was he stricken.  And he made his grave with the wicked, and with the rich in his death; because he had done no violence, neither was any deceit in his mouth.  Yet it pleased the Lord to bruise him; he hath put him to grief: when thou shalt make his soul an offering for sin, he shall see his seed, he shall prolong his days, and the pleasure of the Lord shall prosper in his hand.  He shall see of the travail of his soul, and shall be satisfied: by his knowledge shall my righteous servant justify many; for he shall bear their iniquities.  Therefore will I divide him a portion with the great, and he shall divide the spoil with the strong; because he hath poured out his soul unto death: and he was numbered with the transgressors; and he bare the sin of many, and made intercession for the transgressors. Isaiah 53:1-12
This fulfillment of scripture through Jesus was to the fulfillment of the law in order for the inheritance to be made available to God’s children. This was not a promise to just the children of Israel because anyone who will accept and submit to Jesus become the children of God and heirs according to the promise made back in Abraham’s time. We must realize that the seed as mentioned in the promise is none other than Jesus Christ. Paul made this very clear when he wrote:
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.  But the scripture hath concluded all under sin, that the promise by faith of Jesus Christ might be given to them that believe.  But before faith came, we were kept under the law, shut up unto the faith which should afterwards be revealed.  Wherefore the law was our schoolmaster to bring us unto Christ, that we might be justified by faith.  But after that faith is come, we are no longer under a schoolmaster.  For ye are all the children of God by faith in Christ Jesus.  For as many of you as have been baptized into Christ have put on Christ.  There is neither Jew nor Greek, there is neither bond nor free, there is neither male nor female: for ye are all one in Christ Jesus.  And if ye be Christ's, then are ye Abraham's seed, and heirs according to the promise. Galatians 3:16,22-29
Jesus came to proclaim liberty to the captives. This is for all of mankind, if they would accept it. This was done through Jesus’ own death and resurrection. It was by His death that we are able to be righteous for the sole purpose of bringing God the glory that He deserves:
The Spirit of the Lord God is upon me; because the Lord hath anointed me to preach good tidings unto the meek; he hath sent me to bind up the brokenhearted, to proclaim liberty to the captives, and the opening of the prison to them that are bound;  To proclaim the acceptable year of the Lord , and the day of vengeance of our God; to comfort all that mourn;  To appoint unto them that mourn in Zion, to give unto them beauty for ashes, the oil of joy for mourning, the garment of praise for the spirit of heaviness; that they might be called trees of righteousness, the planting of the Lord , that he might be glorified. Isaiah 61:1-3
A much misused scripture from the Bible is "This is the day which the Lord hath made; we will rejoice and be glad in it." I woke up to a beautiful morning the other day. Others who saw that same sunrise will likely do as many tend to do on days like that day and ascribe this verse to that day but I cannot do the same. You see, this verse and the chapter where it comes from speaks only about one specific day in the history of mankind. It was for this day which our Lord and Saviour Jesus Christ had to be born. That day for which we need to rejoice and be glad was the day that our Saviour died for our sins.
I will praise thee: for thou hast heard me, and art become my salvation.  The stone which the builders refused is become the head stone of the corner.  This is the Lord's doing; it is marvellous in our eyes.  This is the day which the Lord hath made; we will rejoice and be glad in it.  Save now, I beseech thee, O Lord : O Lord , I beseech thee, send now prosperity.  Blessed be he that cometh in the name of the Lord : we have blessed you out of the house of the Lord .  God is the Lord , which hath shewed us light: bind the sacrifice with cords, even unto the horns of the altar.  Thou art my God, and I will praise thee: thou art my God, I will exalt thee.  O give thanks unto the Lord ; for he is good: for his mercy endureth for ever. Psalm 118:21-29
It was that day, the day He died, that opened the door for us to be able to be born again, to become new creatures, to be reconciled back to God. God’s number one plan for us is to be reconciled back to Him so that He can bring glory to Himself through mankind once again. This was His intention from the very start when He created man. It was man who choose to walk away from God and when that happened that was when God went to work fulltime on reconciling us back to Him.
For verily he took not on him the nature of angels; but he took on him the seed of Abraham.  Wherefore in all things it behoved him to be made like unto his brethren, that he might be a merciful and faithful high priest in things pertaining to God, to make reconciliation for the sins of the people.  For in that he himself hath suffered being tempted, he is able to succour them that are tempted. Hebrews 2:16-18
Because God’s number one agenda is reconciling men back to Him and since we are created in His image and are blessed with being part of His plan of reconciliation then it makes sense that we ought to also have a lifetime ministry of reconciliation. This includes working to reconcile ourselves with other men, reconciling men with each other and most importantly being available as a tool in God’s hand to help men get reconciled back to God.
Therefore if any man be in Christ, he is a new creature: old things are passed away; behold, all things are become new.  And all things are of God, who hath reconciled us to himself by Jesus Christ, and hath given to us the ministry of reconciliation;  To wit, that God was in Christ, reconciling the world unto himself, not imputing their trespasses unto them; and hath committed unto us the word of reconciliation.  Now then we are ambassadors for Christ, as though God did beseech you by us: we pray you in Christ's stead, be ye reconciled to God.  For he hath made him to be sin for us, who knew no sin; that we might be made the righteousness of God in him. 2 Corinthians 5:17-21
Blessed are the peacemakers: for they shall be called the children of God.  Ye have heard that it was said by them of old time, Thou shalt not kill; and whosoever shall kill shall be in danger of the judgment:  But I say unto you, That whosoever is angry with his brother without a cause shall be in danger of the judgment: and whosoever shall say to his brother, Raca, shall be in danger of the council: but whosoever shall say, Thou fool, shall be in danger of hell fire.  Therefore if thou bring thy gift to the altar, and there rememberest that thy brother hath ought against thee;  Leave there thy gift before the altar, and go thy way; first be reconciled to thy brother, and then come and offer thy gift.  Agree with thine adversary quickly, whiles thou art in the way with him; lest at any time the adversary deliver thee to the judge, and the judge deliver thee to the officer, and thou be cast into prison.  Verily I say unto thee, Thou shalt by no means come out thence, till thou hast paid the uttermost farthing. Matthew 5:9,21-26
Keep yourselves in the love of God, looking for the mercy of our Lord Jesus Christ unto eternal life. And of some have compassion, making a difference: And others save with fear, pulling them out of the fire; hating even the garment spotted by the flesh. Jude 21-23
Without repentance we die. Repentance is a key part in God’s plan of reconciliation. Repentance is beyond just being sorry for sin but a complete rejection of sin without returning to it. All too often when this comes up from the pulpits sin is not adequately defined. Paul said to the Romans in chapter 7 verse 7 exactly what sin was. He wrote “…I had not known sin, but by the law: for I had not known lust, except the law had said, Thou shalt not covet.”
Here are some scriptures that highlight the importance of repentance:
The Lord is not slack concerning his promise, as some men count slackness; but is longsuffering to us-ward, not willing that any should perish, but that all should come to repentance. 2 Peter 3:9
I tell you, Nay: but, except ye repent, ye shall all likewise perish. Luke 13:3
With repentance and sincere belief in Him we live for eternity with our Father in heaven.
For God so loved the world, that he gave his only begotten Son, that whosoever believeth in him should not perish, but have everlasting life.  For God sent not his Son into the world to condemn the world; but that the world through him might be saved.  He that believeth on him is not condemned: but he that believeth not is condemned already, because he hath not believed in the name of the only begotten Son of God.  And this is the condemnation, that light is come into the world, and men loved darkness rather than light, because their deeds were evil.  For every one that doeth evil hateth the light, neither cometh to the light, lest his deeds should be reproved.  But he that doeth truth cometh to the light, that his deeds may be made manifest, that they are wrought in God. John 3:16-21
So why was He born?
So that He could die.
And why did He die?
He died so that we may live.
We must never forget this.
In fact we are told to remember this consistently until He returns again.
Keep in mind that we are never told to do the same at any level with His birth.
We are to remember His death as this is the most important thing that has ever occurred during the history of mankind, this includes the very creation of mankind. Without His death mankind is doomed for eternal death, separated from their creator.
For I have received of the Lord that which also I delivered unto you, That the Lord Jesus the same night in which he was betrayed took bread:  And when he had given thanks, he brake it, and said, Take, eat: this is my body, which is broken for you: this do in remembrance of me.  After the same manner also he took the cup, when he had supped, saying, This cup is the new testament in my blood: this do ye, as oft as ye drink it , in remembrance of me.  For as often as ye eat this bread, and drink this cup, ye do shew the Lord's death till he come. 1 Corinthians 11:23-26