The late Doc Counsilmen (Head swimming coach at Indiana University circa 1960-1980) who also coached the likes of Mark Spitz, Charlie Hickcox, Gary Hall, and the rest of the USA Olympic Swim Team in 1968 and 72, had a theory on what makes people great. It's his Hurt/Pain/Agony Theory. Anyone who wants to compete and just basically show up will go through the Hurt of hard work, but will never go past the Hurt Phase due to lack of willpower or tenacity. People who want to be good will stop after the Pain Phase, thus never achieving true greatness. It is those few in any sport who push themselves beyond the pain into the Agony Phase and thrive there that makes them great. Going through the Agony Phase requires a mental fortitude that so very few people actually possess. You can see the ones who do possess the fortitude to go through the Agony phase, Micheal Johnson, Joe Montana, Wayne Gretsky, Brookes Robinson, Roland Martin, Ricky Clunn, Dale Sr. and in the topic of this conversation, KVD. There are still phenominally good athletes who are stuck in the Pain Phase, but those 'stars' come and go. It's the truly great ones in the Agony Phase that are few and far between.