Pleasure, cheerfulness, delight. Some say that the same thing is signified by these words, as far as the underlying concept is concerned. But Prodicus[1] tried to assign a particular signification to each of these nouns,[2] just as the followers of the Stoa do, saying[3] that joy is a reasonable elation, while pleasure is elation without reason; "delight" is pleasure that comes from things we see, "cheerfulness" from words. But this is a prescriptivist outlook. For it is not a mistake to call pleasure "joy"; just as it is not a mistake to call the monad "indivisible"; nor to call joy "joy" or the monad "monad". But agreeing to call one thing by a thing that is different is absurd and false.