Naturally where the divorcing of words as symbols, from things as symbolized, is imperfect, there must be difficulty in giving to abstract words a sufficiently abstract meaning. If in the first stages of language the concrete name cannot be separated in thought from the concrete object it belongs to, it is inferable that in the course of forming successively higher grades of abstract names, there will have to be resisted the tendency to interpret each more abstract name in terms of some one class of the less abstract names it covers. Hence, I think, the fact that Aristotle supposes happiness to be associated with some one order of human activities, rather than with all orders of human activities. Instead of including in it the pleasurable feelings accompanying actions that constitute mere living, which actions he says man has in common with vegetables; and instead of making it include the mental states which the life of external perception yields, which he says man has in common with animals at large, he excludes these from his idea of happiness, and includes in it only the modes of consciousness accompanying rational life. Asserting that the proper work of man "consists in the active exercise of the mental capacities conformably to reason," he concludes that "the supreme good of man will consist in performing this work with excellence or virtue: herein he will obtain happiness." And he finds confirmation for his view in its correspondence with views previously enunciated; saying, "our notion nearly agrees with theirs who place happiness in virtue; for we say that it consists in the action of virtue; that is, not merely in the possession, but in the use."