How does Jesus being the truth (John 14:6) and testifying to the truth (John 18:37) reveal the Trinity?

John 18:37 > “‘So you are a king?’ Jesus said, ‘You say that I am a king. In fact, the reason I was born and came into the world is to testify to the truth. Everyone on the side of truth listens to me.’” John 14:6 > “Jesus answered, ‘I am the way and the truth and the life. No one comes to the Father except through me.’” John 15:26 > “When the Advocate comes, whom I will send to you from the Father—the Spirit of truth who goes out from the Father—he will testify about me.” John 1:18 > “No one has ever seen God, but the one and only Son, who is himself God and is in closest relationship with the Father, has made him known.” If Jesus declares that He came into the world to bear witness to the truth (John 18:37), and also affirms that He Himself is the truth (John 14:6), how does this personal testimony reveal the intrinsic relationship between the Father, the Son, and the Holy Spirit in the Trinitarian concept—where the Son not only communicates truth but is the very Truth proceeding from the Father and manifested in the Spirit?