The Natures are the various underlying substance of the Things, each Thing , corresponding to at least one of the Beings. Put another way: every individual Being partakes of a nature which defines its
Talon Nature
Talon Nature is the set of all essential characteristics of Talon; and there is Human Nature, which is the set of all essential characteristics belonging to Humans.
Human Nature
Put differently: a Being's Nature is that which cannot undergo change past its systole or diastole, without that Being becoming a different Being. A Being itself undergoing change beyond its systole means the death of that Being. A Being undergoing change beyond its diastole means the apotheosis of that Being.