Jesus continues his talk on the coming of the Holy Spirit. The Spirit shall show the world it was wrong about sin and about judgement. But the Spirit shall show this to the believing Christian in his heart, not to the world, because the world cannot know the work of the Spirit. The Spirit comforts and enlightens the individual, he works within the heart of each person showing us the truth of what Jesus says and does.
But we must be open to what the Spirit wants to teach us and what he has to say to us.
This knowledge the Spirit gives us allows us to see the world and its values for what they really are; passing and shallow. While we still have to live in the world, do our work etc. we can live at peace with ourselves, God and our neighbour in the midst of all the turmoil.