II
If then in what we do there be some end which we wish for on its own account, choosing all the others as means to this, but not every end without exception as a means to something else (for so we should go on ad infinitum, and desire would be left void and objectless)—this evidently will be the good or the best of all things. And surely from a practical point of view it much concerns us to know this good; for then, like archers shooting at a definite mark, we shall be more likely to attain what we want.
If this be so, we must try to indicate roughly what it is, and first of all to which of the arts or sciences it belongs.
It would seem to belong to the supreme art or science, that one which most of all deserves the name of master-art or master-science.
Now Politics1 seems to answer to this description. For it prescribes which of the sciences a state needs, and which each man shall study, and up to what point; and to it we see subordinated even the highest arts, such as economy, rhetoric, and the art of war.
Since then it makes use of the other practical sciences, and since it further ordains what men are to do and from what to refrain, its end must include the ends of the others, and must be the proper good of man.
For though this good is the same for the individual and the state, yet the good of the state seems a grander and more perfect thing both to attain and to secure; and glad as one would be to do this service for a single individual, to do it for a people and for a number of states is nobler and more divine.
This then is the aim of the present inquiry, which is a sort of political inquiry.2