The birth of Jesus was God’s entrance to the world as predicted in Isaiah, He says;
[Isaiah 9:6] For to us a child is born, to us a son is given, and the government will be on his shoulders. And he will be called Wonderful Counselor, Mighty God, Everlasting Father, Prince of Peace.
[Isaiah 7:14]: Therefore the Lord himself will give you a sign: The virgin will be with child and will give birth to a son, and will call him Immanuel (God with us).
Roughly 700 years before Jesus, prophet Isaiah predicted the coming of a Son. He will be born to a virgin woman and will be called a Mighty God or everlasting Father. This prediction was fulfilled in Mary, Angel Gabriel said to her;
[Luke 1:30-32] So the angel told her, “Do not be afraid, Mary, for you have found favor with God. Behold, you will conceive and give birth to a son, and you shall give Him the name Jesus. He will be great and will be called the Son of the Most High. The Lord God will give Him the throne of His father David.
Jesus was a perfect human and God in Spirit. God raised a human being, and dwelt in it [Deuteronomy 18:18 & John 14:10]. Jesus’ humanity had a beginning, but His Spirit has no beginning and end. Jesus even declared that He has no beginning and end for He says;
[John 8:58] Jesus said to them, “Truly, truly, I say to you, before Abraham was born, I AM”
[John 8:23-24] “You are from below; I am from above. You are of this world; I am not of this world. I told you that you would die in your sins; if you do not believe that I AM HE, you will indeed die in your sins.”
[John 13:19] “I am telling you now before it happens, so that when it does happen you will believe that I AM WHO I AM.
Jesus took the name of God of Abraham in John (8:23-24 & John 13:19), Compare these verses to (Isaiah 43:10 & Exodus 3:13-14);
[Exodus 3:13-14] “If I come to the people of Israel and say to them, ‘The God of your fathers has sent me to you,’ and they ask me, ‘What is his name?’ what shall I say to them?” God said to Moses, “I AM WHO I AM.” And he said, “Say this to the people of Israel, ‘I AM has sent me to you’.
[Isaiah 43:10] “You are my witnesses,” declares the LORD, “and my servant whom I have chosen, so that you may know and believe me and understand that I AM HE. Before me no god was formed, nor will there be one after me.
“I AM, I AM HE, or I AM WHO I AM”, is the name of God in the Bible; it speaks his self-existence; that He has no beginning and end, that He is the First and the Last, ever the same.
Also read: The Oneness of God (of Abraham) and Jesus