As the word before Jesus came in the flesh, the word was God: the word was with God and was God, in a certain sense, in the way what a person says can be said to be that person, they speak and you hear them speak and you can say you are hearing them.
The word became flesh. As Jesus, the Christ, he is the Son of God and human. Not God, but with some god-like glory in being the Son of God, such that when speaking of it the Jews thought he blasphemed.
Having been raised from the dead to never die and going back to be with the Father he went back to being the pervasive word with glory like he first had as the word of God: Glory of God but not literally God except in a certain sense, still the Son of God, still a human, but in form of God more now he is raised and with the Father. He is a life-giving spirit who can reach many, many through the work of the Holy Spirit and by the mighty spiritual power God gives him. Yet he is still a human and as such he can mediate between mankind and God the Father.
