One's mentality is instilled from the training one receives and for what application you intend to use it. The discipline I have is from my training but I do it for both love of it and wanted to expand my defensive/offensive capabilities with different weaponry (for both personal and professional reasons). I am trained and disciplined enough to separate the two though for both sport or combat. I am not about going in for the kill unless that is my intention. I train to self-improve so that when I need to fight, I WILL use my skills for that. When I want to play, I have fun!!!
Knowing control comes from the setting you are in and the mentality you have.
I don't have the mindset for 'competition'. I train to fight and survive not compete. I practice to be better. I do not like to give away what I can do. I like to watch others to see where they lack & where I can improve myself. Some people can separate the two easier but most don't share my occupation. However, I also train people but how I train them depends on what they are seeking to learn from me.