Although magic is- by virtue of it's nature- magic can be used in two major schools of thought:
Ethereal Magic: Through interaction with the "ether"- that is taking the inherent magic of the universe and shaping it to ones purpose.
Divine Magic: Not to be confused with "yahweh the divine" rather any magic that has been decreed by A god or other deity.
The major difference is that divine magic is only accessible because some deity has willed it so. This would also explain why magic words or gestures have effect. Because some deity has made that universes "rules" work that way. In an ethereal magic universe there is no reason that speaking words would have any effect except as a method to frame the mind to shape or form the magic.
Divine magic on the other hand uses words more to get the attention of some deity.
Of course divine magic is also how stories might function in which there is some "primordial language" spoken by some ancient precursor to contemporary intelligent beings ( humans included).
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