What does it mean to be on the side of truth?

 35 “Am I a Jew?” Pilate replied. “Your own people and chief priests handed you over to me. What is it you have done?” 36 Jesus said, “My kingdom is not of this world. If it were, my servants would fight to prevent my arrest by the Jewish leaders. But now my kingdom is from another place.” 37 “You are a king, then!” said Pilate. Jesus answered, “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.” 38 “What is truth?” retorted Pilate. With this he went out again to the Jews gathered there and said, “I find no basis for a charge against him. John 18:35–38 (NIV) 

Jesus declares the purpose of his existence–to testify to the truth. He goes further to say that everyone on the side of truth listens to him. It causes me to ask the question what does it mean to be on the side of truth? The implication to me is that if Jesus is on the side of truth then those who don’t listen to him are not on the side of truth. If Jesus came into the world to testify to the truth, then as a follower of Jesus I must do the same. He implies that everything he has said is truth. That truth exists. Comments such as truth is relative;there is no such thing as truth; there are no absolutes; it’s true for you but not for me; or truth is in the middle are contradictory to Jesus. To be on the side of truth is to agree with Jesus.