To the Passover pilgrims Jesus cried out that whoever believed in Him actually believed in the Father who sent Him. Not only that, but whoever saw Jesus, saw the Father. Here we find that the core doctrine of the Trinity, though impossible for us to fully grasp, is nevertheless the reality of who God is. Indeed, those who reject Jesus reject the Father as well. Those who reject His words have a judge, and that judge is His own words. And these words were the message that the Father had told Jesus.