So it seems to me that calling Jesus “the Word” is John’s way of emphasizing that the very existence of the Son of God is for the sake of communication. First, and foremost, he exists, and has always existed, from all eternity for the sake of communication with the Father. Secondarily, but infinitely important for us, the Son of God became divine communication to us. One might say, in summary, calling Jesus “the Word” implies that he is “God-Expressing-Himself.” To us. – The Dawning of Indestructible Joy by John Piper