The shared perception of all things, from ecosystems to people to communities of individual organisms gives form to physical reality. It is a shared reality, but one where those with greater will or the ability to focus their Will have more powerful votes, at least within a limited time and space.
Magic is performed when a being uses Will to master and change reality in a specific way, for a limited period of time. In Ashar, magic is used by all thinking beings, anything capable of conceiving a desire is able to use magic to a degree. Most beings use it unconsciously in an uncontrolled manner. Sapient creatures can do more through the employment of tools and symbols and disciplined minds. The most highly trained are true artists of reality.
Magic that is directed inwards, into one's own mind or body, to manipulate personal reality is esoteric magic magic. Magic directed outwards to change the reality shared with other things and creatures is exoteric magic.