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 woman said to Him, ‘Sir, give me this water, so I will not be thirsty nor come all the way here to draw.” Do you see what she is saying? I want to get this kind of water so I won’t constantly be thirsty and draw here.
John 4:37-38, “For in this case the saying is true, ‘One sows and another reaps. I sent you to reap that for which you have not labored; others have labored and you have entered into their labor.”
Galilee is prepared to welcome Him because they had already been impressed by an account of some of their members that had seen Him when He was in Jerusalem at the Passover. John 4:45, “So when He came to Galilee, the Galileans received Him, having seen all the things that He did in Jerusalem at the feast; for they themselves also went to the feast.”
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?