When I first came to know that the catholic church had banned Copernicus' book because in it he suggested that the earth revolves around the sun, I thought 'What!, its so obvious'. Maybe it was because I already 'knew' that the earth is not the centre of our solar system. But now I can understand why the church did what it did. When we hear something getting repeated or experience something everyday, we tend to think that this is how things are. And when we encounter something out of the ordinary it comes as a rude shock. We have been wired to think about ourselves a lot, it's how we have survived as a species. Of course we think about our families, our friends, relatives and the society(this one is unnecessary most of the times). But we think about all of them from 'our' perspective. For people living in cities, this becomes a more acute problem because we have a very strict routine and few (meaningful) human contacts. So we are always concerned with