One of the greatest challenges in teaching History is to convey the uniqueness in its conception of something that through the passage of time has become an accepted part of everyday life. When something has been around longer than we have it's hard to realize that it wasn't always there. It takes a conscious effort to understand that yesterday wasn't today only earlier and tomorrow won't be today only later. The permanence of the now is an illusion which helps us walk as if the shifting sands of our lives are really the solid shore of the sea of time.
