What is Morality? Obviously it is necessary to attempt a clear answer to this question before any useful purpose can be served by inquiring into the group of problems to which it gives rise: its aim, its laws, its origin, its method, its assumptions. The Stoics answer this question as follows: "Morality is living according to Nature." Furthermore, it is quite in accordance with the doctrine of the Stoics that Cicero says: "Virtue, however, is nothing but Nature developed to the highest possible degree of perfection" ("_ad summum perducta_"). Moral therefore means natural; Morality and Nature are equivalent; they are one. Really a simpler or more childlike explanation is hardly possible. The most superficial glance at human life and at our own soul teaches us that Morality is contrary to Nature, that it must struggle against Nature to assert itself, that it means a victory over Nature, in so far as we understand by Nature in this special sense the most primitive reaction of man to simple and more complicated stimuli, the first tendency of impulse, the immediate, instinctive urge to act. Further, the definition of the Stoics ignores the aggregation of concepts which the synthetic conception, Morality, involves; as if this were self-evident and required no definition. The Stoics tacitly assume that Morality and Good are synonymous. Cicero makes this assumption clearer by using the word Virtue (_virtus_) instead of Morality. But in all languages this word implies approbation and praise. It is an appreciation of worth (_Werturteil_), to use the expression so appropriately coined by Lotze. But the very fact that we recognize Morality as being valuable is by no means a matter of course and it demands an explanation.