I like one colleague's definition. She explains magic on its most basic level, and in conjunction with the Threefold Law, which is why I like to refer people to it. Let's take this a step further. Looking at the dictionary definition gives us a jumping point further into the topic. Our tools, be they herbs, numbers, planetary alignment and other correspondence aids in our focus of the phenomenon we call magick.
Breathing is magic.
When we examine all its intricacies that make us live-wow. What an amazing machine we are. But magick also encompasses gathering herbs, choosing stones, coloring ink and burning candles. All we do is focus, focus our energies, our thoughts, our intentions. Our intentions bring desire, that desire brings more power.