Its part of human nature to explore ones potential. Why does the pole vaulter hurl herself skyward? Why does the mathematician push his craft to greater elements of abstraction? Why does a child, having learned how to do one somersault, then try to do two, then three, then four?

If there is a unique characteristic to human activity it is this: Man revels in doing what he does well, and having done it well, rejoices in doing it better. (Jacob Bronowski--The Ascent of Man).