"We don't know what causes places, or inorganic objects, to have particular magical properties, but if the same kind of stone is quarried from different places, the magical qualities will be more similar than two different types of stone from the same place. The magical properties of living things seem to be a kind of natural spellcraft, in the same way that a hawk's talons are natural weapons or a tortoise's shell is natural armor."
"The same materials and species bear the same properties across cultures, and new species and materials already have their magical properties when they are first discovered."
"Every human being has a complex magical structure integrated with their body; it is often considered as the part of the body that is composed of magic. This structure is incidentally involved in a variety of biological processes, and necessarily involved in every instance of spellcasting, since as the part of the person that is of magic it is the means by which one interacts with magic. This is what we call the soul."
"Other living things have magical aspects likewise, but none so potent or complex as a person's. We do not truly understand why, but it is often speculated to be related to the capacity for speech, due to the importance of incantations; though people mute from birth exhibit no known magical differences from any other person."
"Just as people, animals, and plants are primarily physical and secondarily magical, there are likewise types of beings that are primarily magical and secondarily physical. Some types of these can attach themselves parasitically to a person, inhibiting their ability to think clearly and overshadowing their thoughts and feelings with its own animalistic ones, until it is removed. Others attach themselves in a similar way to an animal, in which case the relationship is not necessarily harmful to the animal, and may even be beneficial. Still others attach to a place, influencing the flora and fauna there in subtle ways. Most types, however, are largely independent of any such symbiosis."
"This class of beings is what we call spirits, and the parasitic attachment we call possession."