For the athlete, it is the thrill of crossing the line first; an adrenaline intensity so strong, that a decade of training is justified in just one moment.
For the artist, it is something more intimate; a moment of apparent truthfulness, where mind, body and soul come together in such a compelling way, that you cannot help but say, "yes, that was beautiful".
Those who don't experience the moment see the pursuit as sheer folly.
For those that do, it encapsulates a lifetime's meaning. One taste can be enough to propel the seeker through an infinite sea of incompetence and failure.
Anyone can do it, in any field. Sport, and the arts, just happen to be especially shareable.