... all knowledge in the world is small recompense for the things we can't possibly know. There seem to be two contradictory facts about human nature. The first is that there is a sharp limit to what we can understand. Everytime we expand the store of the known, this expansion serves to make it obvious just how much - everything, really - lies beyond that limit. The second fact about human nature is that we want more than anything else to see beyond that limit.