His point (not his main one) was that success was largely based on luck.
Success also depends upon what game you are playing.
For instance, take card games: many people might define success as "winning the most hands", whereas a poker player would prefer maximizing his stake over winning hands, and from what I've observed of bridge players, they seem to define success as being able to know how the remainder of the hand will play out having only seen a minimum of cards...
-Dave
