John 14 Jesus provides confort to His believers

How can Jesus and the Father be one without being the same person? How does the trinity work or is that just a creation of men? How do Jesus, the Father, and The Holy Spirit identify themselves in scripture? Is it more important for me to love God or that he loves me? What are these things that the Holy Spirit will teach? Why is the Holy Spirit called the Comforter? These questions answered, and more, in this chapter of John.