[The animal soul is different in kind from the rational soul though both constitute one person; while the rational soul of a man is the same in kind with that of another man. Similarly, says Augustin, there is a difference in kind between the human nature and the divine nature of Christ, though constituting one theanthropic person, while the divine nature of the Son is the same in substance with that of the Father, though constituting two different persons, the Father and Son.—W.G.T.S.]