I find this interesting as well because I have never had to use a circle or any other thing to cast spells I have just drawn the energy from myself for the casting and then replenished it from the earth, or the universal energy, so I have never gotten tired after casting a spell or drained as some people have explained to me that happens to them when casting spells. That was the main reason why I asked that the way I did.
I do Shaolin kungfu and am Chinese. For me, magic is chi/chakra/qi/ki. I think that all magic is the same, and all the different theories are different methods to achieve different results. A lot of Eastern magic, for example, is infused with an object/person, or used to attract other forms of energy like spirits. I'm not really religious so I wouldn't be able to say much about deities. I know eastern magic is generally more of healing with chi, body enhancement, infusing herbs with healing power, communing with spirits, excorcism, etc. Western magic, on the other hand, generally relies on channeling magic from deities or controlling the elements. I feel like western magic is a lot more physical than eastern??? Maybe just me. It's interesting how people can heal themselves with qi though. I would like to follow the path of a qi manipulator in magic, though I'm just starting out. What are some things you do in you martial arts that improve your magic, or vice versa? Also, if you have a shifu, do they know that you also practice magic? I know a lot of Eastern martial arts have some form of qi intertwined with the art.