“And the Word became flesh and dwelt among us, and we have seen his glory, glory as of the only Son from the Father, full of grace and truth. (John bore witness about him, and cried out, “This was he of whom I said, ‘He who comes after me ranks before me, because he was before me.’”) And from his fullness we have all received, grace upon grace. For the law was given through Moses; grace and truth came through Jesus Christ. No one has ever seen God; the only God, who is at the Father's side, he has made him known. (John 1:14-18)
John 1:14 is pivotal in the gospel of John and for Christian theology in general. The word who is God, who is eternal steps into time and space and takes on human flesh to dwell among us, to tent among us as the Greek says. He replaces the temple with flesh and bone, he becomes our temple so that where he is, where two or three are gathered in his name, they can worship him in spirit and in truth. He comes to us as our savior full of grace and truth. The grace is his mercy, the mercy of God upon his creation whom he loves, mercy found in the forgiveness of sins, and truth in this, that God is steadfast and faithful to his promise, and what he promises he delivers, and what he promised was salvation for all mankind. This is found here in the word become flesh, the man named Jesus of Nazareth, in whom we all receive grace upon grace, who has made God known to us, with grace and truth.