Read John 1:18
18 It is true that no one has ever seen God at any time. Yet the divine and only Son, who lives in the closest intimacy with the Father, has made him known. (JBP)
One of the glories of English architecture is Exeter Cathedral. One of the particular features of that building is the roof of the nave. The problem is that the said roof is so high that you have to squint your eyes and twist your neck in order to see it. So the Cathedral helpfully supplies mirrors which both magnify the view of the roof and save you having to look upwards all the time. You carry around the mirrors which enable you to enjoy what you could not otherwise enjoy.
We cannot possibly grasp the glories of God himself. God determined to send Jesus his Son to show us what he was like. Jesus is like a mirror image of God. He reveals to us what we could not otherwise see or understand. If we want to know what God is like, we need to look at what Jesus was like.
Jesus was God spelling himself out in a language human beings can understand. He was the human expression of God. Because he was not just any normal human being, he shows us what God is like. And because he was a real human being and not just a divine visitor, he shows us what true, healthy humanity is like.
If we are to have any dealings with God, we must first deal with Jesus.