Professional sport
When I talk about practice, I mean something individual. If you look at professional golfers or tennis players, you will observe that the practice composes the basis of their preparation for tournaments. Of course it does, (1) for these are individual sports. [...] Part of what is fascinating, and slightly repellent, about sports lies in that curious inversion of values (2) insofar much that we admire in ordinary life - humility, compassion, unwillingness to take advantage of the weakness of others - is reversed on the field of play. Professional sport is all about winning. And, within reason the more you practice (and the more you train) the better your chances of doing so.
Adapted from: WALLACE, David Foster. String Theory: David Foster Wallace on Tennis. Little, Brown and Company, 2011.