(14) And the Word was made 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. King James Version
Near the beginning of his gospel, John makes an astonishing declaration. Though it may be familiar to us, having read it often, its singularity should still electrify us: "And 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" (John 1:14). To the Greek mind, that a god—let alone the God—would debase himself by becoming flesh and blood was preposterous. John's announcement was a psychological earthquake, a force that violently shook reality, requiring a reevaluation of all thought.
As fantastic as this was, almost as astounding is John's earlier declaration: "He came to His own, and His own did not receive Him" (John 1:11). Whether we understand "His own" to be limited to Israel and Judah or to comprise all men, the essence is the same: God became a man, but His now-fellow men would not accept Him. At every turn, He was doubted, challenged, and scorned by people blinded and enslaved by their expectations of what God should be like.
With rare exception, the people did not recognize who He was, and they did not believe Him when He told them because their minds already had a firm image of what the Messiah should be like, as well as how the prophecies of His coming shouldbe fulfilled. Their ideas about these things were so ironclad that they were unable to recognize the reality standing in front of them.
The people of Jesus' time had expectations about where the Messiah should come from (John 1:46) and about what He should do and not do (Matthew 11:19; 12:2, 10; 15:2; 17:24)—and when (Mark 2:24; 3:2; John 5:8-10). They had expectations about the rituals and traditions they thought He and His followers should keep (Matthew 15:2; Mark 7:1-5), about what He should say (Matthew 15:12; 19:3, 21-22), about whom He should associate with (Matthew 9:11; 11:19; Mark 2:16), and about how He should do His job (Matthew 16:21-22). They had expectations about His signs and miracles (Matthew 12:38; 16:1; 26:67-68; 27:40, 42; Mark 8:11; John 2:18). They even had expectations about which family He should be from (Matthew 13:55-57; Mark 6:3)!
Essentially, they expected their Savior to validate everything they already believed. Rejecting any suggestion that they did not have it all figured out, their expectations kept them from seeing the Son of God when He appeared in their midst! Their expectations not only blinded them to the reality of Immanuel ("God with us"), but also caused them to persecute and ultimately kill this One who did not conform to their ideas.
This difficulty is not unique to the first century. A core part of everyone is his perspective, his mental map of the world, the lens through which he sees everything. It develops over time, fashioned by environment, experience, education, and the culture at large. As a person ages, he continues to hone this lens, shaping it into what he believes is a more precise tool for viewing the world.
This happens naturally, as a result of our first parents' decision to take from the Tree of the Knowledge of Good and Evil. However, as in Christ's time, problems arise when people use a carnal lens to view spiritual things. Only a very few at the time had a spiritual lens to see the Son of God for who He was. The remainder had only a carnal lens that distorted and perverted all that they perceived.
— David C. Grabbe