" But relevance is a matter of time and space. What matters to you can hardly be considered to be of importance to a traffic warden in a village you never even heard of on Earth. You may sit on a train, or in a car on that planet, and watch events pass that concern you not and affect you not. Yet for those involved directly they can be the most agonising moments of life. The mother who has just lost a child; the lover just deserted. You may see them by the road side but know nothing of their grief. "