John 7: Jesus in Jerusalem at the Feast of Booths

 In all other gospels, the story happens in Galilee and then, Jesus goes to the Passover where he is crucified. In the gospel of John, Jesus goes many times from Galilee to Jerusalem. In John 7, Jesus is in Jerusalem at the Feast of Booths (which is not Passover, but another Jewish celebration). There, he discourses about being extremely important to know the Lord:

28-29 That provoked Jesus, who was teaching in the Temple, to cry out, “Yes, you think you know me and where I’m from, but that’s not where I’m from. I didn’t set myself up in business. My true origin is in the One who sent me, and you don’t know him at all. I come from him—that’s how I know him. He sent me here.”
37-39 On the final and climactic day of the Feast, Jesus took his stand. He cried out, “If anyone thirsts, let him come to me and drink. Rivers of living water will brim and spill out of the depths of anyone who believes in me this way, just as the Scripture says.” (He said this in regard to the Spirit, whom those who believed in him were about to receive. The Spirit had not yet been given because Jesus had not yet been glorified.)

According to the gospel of John, Jesus is the one who reveals the Lord, the Father. Without him, we can't know the Lord. The one who comes to Jesus desiring to live (water), will have an abundant life because the Spirit will be with him. The gospel of John talks about the Trinity, doesn't it?