Universe is huge beyond our imagination, and mankind not even a droplet in this ocean. (Read more here.) It is a humbling feeling when we consider how insignificant we are. However in everyday life we cannot afford to have this viewpoint. Life is a struggle at each step and you have to be 'narrow-minded' in a sense. (This again is a bit of extension of previous post. My argument for not doing anything simply because I am not the one who has choices will do me no good.)
While thinking this, it struck me that it is somewhat analogous to the case of arguably two of the greatest scientists ever - Newton and Einstein. Einstein might have revolutionized our perceptions about the universe, time, dimensions et al and might have proved Newton's laws wrong (inadequate would be a better word, perhaps); but the activities that usually take place around us are still governed by Newton's laws. [Newton dealt with 'world'ly things, Einstein with universal ones. :)] Newton's laws might be outdated and 'narrow', but they are the ones which rule our lives mostly.