Surely then, even with reference to actual life and conduct, the knowledge of it must have great weight; and like archers, with a mark in view, we shall be more likely to hit upon what is right: and if so, we ought to try to describe, in outline at least, what it is and of which of the sciences and faculties it is the End. Now one would naturally suppose it to be the End of that which is most commanding and most inclusive: and to this description, πολιτικὴ[1] plainly answers: for this it is that determines which of the sciences should be in the communities, and which kind individuals are to learn, and what degree of proficiency is to be required. Again; we see also ranging under this the most highly esteemed faculties, such as the art military, and that of domestic management, and Rhetoric. Well then, since this uses all the other practical sciences, and moreover lays down rules as to what men are to do, and from what to abstain, the End of this must include the Ends of the rest, and so must be The Good of Man. And grant that this is the same to the individual and to the community, yet surely that of the latter is plainly greater and more perfect to discover and preserve: for to do this even for a single individual were a matter for contentment; but to do it for a whole nation, and for communities generally, were more noble and godlike. Such then are the objects proposed by our treatise, which is of the nature of πολιτικὴ: and I conceive I shall have spoken on them satisfactorily, if they be made as distinctly clear as the nature of the subject-matter will admit: for exactness must not be looked for in all discussions alike, any more than in all works of handicraft. Now the notions of nobleness and justice, with the examination of which πολιτικὴ is concerned, admit of variation and error to such a degree, that they are supposed by some to exist conventionally only, and not in the nature of things: but then, again, the things which are allowed to be goods admit of a similar error, because harm comes to many from them: for before now some have perished through wealth, and others through valour. We must be content then, in speaking of such things and from such data, to set forth the truth roughly and in outline; in other words, since we are speaking of general matter and from general data, to draw also conclusions merely general. And in the same spirit should each person receive what we say: for the man of education will seek exactness so far in each subject as the nature of the thing admits, it being plainly much the same absurdity to put up with a mathematician who tries to persuade instead of proving, and to demand strict demonstrative reasoning of a Rhetorician. Now each man judges well what he knows, and of these things he is a good judge: on each particular matter then he is a good judge who has been instructed in _it_, and in a general way the man of general mental cultivation.[2]