Jesus' overarching goal was the glorify the Father. He did so by dying on the Cross. These goals are joined together.
Pilate asked "What is Truth?" when he had Truth, Himself in front of him. I feel Pilate is a tragic character in this parts of the Gospel.
"It is finished!" is the last words of Jesus in the life of Jesus in John's Gospel. It is also something written on a prisoner's debt form when his sentence was paid in full. We are the prisoners.