Well, it is a bit difficult to explain to people who haven't been raised on it from birth... but I've done it a few times while I've been here.
Basically, humans who are capable of magic have what are called magic circuits. Think of them like a sort of secondary nervous system, I suppose. Those allow us to use magical energy, Prana, as we see fit --- either directly from our magic circuits or conduits that can store Prana for later use.
That's the base explanation for it, of course... and the majority of us would say that most of the magic that can be performed through that method is not "true" magic. The technical term for it is Magecraft, but it's simpler to refer to it as magic when explaining it to people from other backgrounds.
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Basically, humans who are capable of magic have what are called magic circuits. Think of them like a sort of secondary nervous system, I suppose. Those allow us to use magical energy, Prana, as we see fit --- either directly from our magic circuits or conduits that can store Prana for later use.
That's the base explanation for it, of course... and the majority of us would say that most of the magic that can be performed through that method is not "true" magic. The technical term for it is Magecraft, but it's simpler to refer to it as magic when explaining it to people from other backgrounds.