So you have self-defense being mostly about being smart and putting yourself in a good position, not getting into bad areas or situations. Literally taking care of yourself, and this means how you treat yourself as well. Then there are arts that have some practicality for self-defense for people. A lot of people can spend time training. However, this will prove of little value if you don’t spend time to learn. You have sports. Sports are outstanding for all kinds of reasons. Boxing is a sport. I enjoyed kickboxing and boxing. I wrestled in high school and college. It was great and it taught me a lot. You have sports and fighting arts, especially things like the modern, mixed martial arts done in things like UFC. There are no weapons. The fighters are of relatively similar size most of the time and there are rules. Then you have combat. Combat has no rules. You stick your wife and my wife on one side of the octagon and give them both Glocks and a 300 pound guy on the other side. They're probably going to win. It's going to be pretty hard on the guy, bullets are no respecters of persons; they don’t care who you are or what you know. So you add a few more people in there and you can't see where they're coming from and you have combat. Increase the number and type of weapons and now you are getting into combat. Training for war is a radically different concept. Samurai training was training for war. It wasn't training for sport; it wasn't training for self-defense; it wasn't training for fighting; it was training for war. You had multiple opponents who had all types of weaponry available to them from spears to arrows to clubs and swords, everything you could imagine. There were no rules, their job was to deceive you and your job was to deceive and kill them. Well, this training is radically different than training for UFC or kickboxing, or self-defense. Or for that matter personal practice for self-enlightenment. Those are completely different things. My opinion though, if you don't train and expose yourself to true danger you're never going to fully understand and get to a place where the ancients got. You can't get there by thinking about it, reading about it, feeling good about. Warm gooey feelings have no place here in that sense of the term. As I frequently tell my students, that warm gooey feeling is usually blood!