When we look at the genealogy of Jesus in Matthew, we find that it goes back to Abraham, who is the ancestral father of the Jewish race. However, Luke goes all the way back to Adam, the origin of the human race. Luke ends his genealogy in chapter 3 verse 38 with the words, “the son of Enosh, the son of Seth, the son of Adam, the son of God.” Luke understood that the story of Jesus begins with Adam and Eve in the Garden of Eden. Sin created the need for the ultimate sacrifice, and only God can be the perfect sacrifice ... but God can't die. So God became flesh, fully man and yet fully God and Jesus died "once for all."
Jesus Became Flesh to Reveal the Father
General revelation notwithstanding, fallen humanity cannot ascend into the heavens and unveil a holy God. The scientists cannot prove God in a test-tube or expose Him through a powerful telescope. The philosophers cannot reveal God through their “philosophizing.” The poets cannot reveal God through their rhymes, nor the writers through their rhetoric. The finite mind of humanity cannot pull back the veil and reveal God. Only God can reveal God, so “the Word became flesh and dwelt among us, and we beheld His glory, the glory as of the only begotten of the Father, full of grace and truth.” “The only begotten God, the One being in the bosom of the Father, that One declared Him.” When I could not go to where He was, He came to me and said, “Here I am!”
Jesus Became Flesh to Fulfill the Law and the Prophets
Jesus became flesh, because until He did the prophesies were unfulfilled, the promises were waiting, the symbols had no meaning, the type had no antitype, and the story had no happy ending. Imagine Cinderella without the Prince showing up to save her from her tormentors, or Sleeping Beauty never to rise again to the kiss of her Prince Charming. Imagine, the novel “To Kill A Mockingbird,” with no Atticus Finch, or Paul Harvey without “the rest of the story.” Without Jesus, there is a gaping hole in the plot of the Old Testament and main character never shows up.