Under the former came the treatment of the alphabet, of the parts of speech, of solecism, of barbarism, of poems, of amphibolies, of metre and music—a list which seems at first sight a little mixed, but in which we can recognise the general features of grammar, with its departments of phonology, accidence, and prosody.
Logic as a whole being divided into rhetoric and dialectic: rhetoric was defined to be the knowledge of how to speak well in expository discourses and dialectic as the knowledge of how to argue rightly in matters of question and answer.
again philosophy was likened to an egg of which ethic was the yolk containing the chick, physic the white which formed its nourishment while logic was the hard outside shell.
Of the three departments we may say that logic deals with the form and expression of knowledge, physic with the matter of knowledge, and ethic with the use of knowledge.
Following out this conception the Stoics identified a life in accordance with nature with a life in accordance with the highest perfection to which man could attain.
