Breathing is the act of magic, as well as the simple act of making a coffee (IMG:
style_emoticons/default/smile.gif) it can be as simple or as complicated as you want it to be.
Crowley define magick as the act of creating change to occur in according to our will.
I think "magick" has been with us since man existed, it is simply the act of thinking and getting things done. For me, "magick" is the ancient psychology of creating change with the help of nature, motored by the engine of our own thoughts. In the modern days, we call them NLP - Neuro Linguistic Programming.
However, as simple or complicated you want to perceive "magick" is, it is there and happened around us whether we will it to happen or we unconsciously made them to happen.