the term ‘race’, again, is frequently used in a very similar sense. Since a ‘race’ is united by being the offspring of the same primogenitor, it must also be united by a common nature. Thus the terms ‘nature’ and ‘race’ are frequently used by Plato as synonyms, for instance, when he speaks of the ‘race of philosophers’ and of those who have ‘philosophic natures’; so that both these terms are closely akin to the terms ‘essence’ and ‘soul’.
