This is something that we hear all the time. Its usually asked in the form of a question, "How long does it take to master this art?" to which the answer is typically, "A lifetime." I usually hear this come up when the subject of cross training comes up. People usually say, "How can you focus on 1 or 2 more arts, when it takes so long to master your original art?"
This is an interesting question, because even after all of the time I've spent doing Kenpo, I still learn things when I work with my teachers. No, I'm not talking about a new technique or kata, but subtle things, such as a stance adjustment, body alignment, etc. One of the last times I was going thru techs., one of the other black belts that was working with us, made a slight adjustment to my body position and the tech was suddenly night and day.
So, if we look at it like that, then yes, it could take a lifetime. So, if thats the case, how could one be expected to be any good at anything else? Add in BJJ classes to your original art....how can you devote the time?
For myself, I view it like this: I'm in no rush to master anything. IMHO, mastering something takes time and lots of it. But each and every time you train, you're getting that much better. I added in Arnis and BJJ to my training, although I'm not as active with the BJJ currently, but I am with the Arnis. I've reached BB level in that art, and still train it. Every time I train, I am training something specific. In other words, during my lessons, I try to pick 1 or 2 things, and focus on those for the lesson, rather than flit back and forth between 10 different things.
Looking at this another way, if it supposedly takes a lifetime to learn an art, then technically, it could take a lifetime to master one particular part of an art. Kata...to really get good at kata, and I dont just mean being able to perform with power, but to really understand it, well, as I said, that could take quite some time. But we still devote time to not only learning the kata, but also the stances, the self defense techniques, the punches, kicks, blocks, etc. So really, IMO, its not going to be that much different, if 1 or 2 more arts were added in. Sure, there will be a slight difference because now you're devoting time to 2-3 things, rather than 1, but I think you can see the point I'm trying to make.
So, what are your thoughts on mastering an art? Do you feel that one has to stay devoted to one thing and one thing only, or is it possible to train at least 1 other thing, train on a regular basis, and always strive to get better?