While the other three gospels portray Jesus as the King, the Servant, and the Son of Man, John portrays Jesus as the Son of God. John stated his theme more clearly than any of the other gospel writers.
The dominant theme of this gospel is how God reaches down and lifts us up and thus becomes the gateway to heaven where you’ll see the angels of God. That’s a fascinating image isn’t it?
It’s the same as if you went to a great concert. A concert can be a very humbling experience in the sense that the glory of the instruments and music can so enrapture you that you’re transported and you don’t even think about yourself at all.
The Law was given through Moses, but grace and truth were realized through Jesus Christ. We have this contrast. The Law led up to Christ but you see the Law could never save anybody. The Law could only bring us to a point of seeing God’s perfection and righteous requirements but nobody could keep the Law. The Law was never intended to save people. It instead was designed to be a schoolmaster to drive us to dependence upon the One that God would send the Lamb of God who would take away the sin of the world.
I want to stress a few thoughts here. I want to stress that this book then is not about an idea. It is about a Person. It is a book that tells us about the way that life truly is. We see certain themes in this gospel that tells us especially about who Jesus Christ is- His true identity and the true meaning of His revelation and redemption.