I approach every part I'm asked to do and decide to do from exactly the same angle: who is this person, what does he want, how does he attempt to get it, and what happens to him when he doesn't get it, or if he does?
I was one of those lucky people with only one talent. It is harder for people with many talents to decide what to do.
China, if they decide to do something, they do it. Not only in football but whatever it is. If you think about the billion population, there must be Messis or Ronaldos out there. There must be many talented football players out there.
A teenager has to decide what they're going to do with their life, and that's one of the most important decisions that you'll make.
I think there is a tendency in science to measure what is measurable and to decide that what you cannot measure must be uninteresting.